Answer:
exothermic reactions
Explanation:
exothermic reactions are reactions that give off heat
Is the ratio of observed phenotypes the same as the ratio of predicted phenotypes? why or why not? 5. pool all of the offspring from your five replicates. how much phenotypic variation do you find? 6. what is the difference between genes and alleles? 7. how might protein synthesis execute differently if a mutation occurs? 8. organisms heterozygous for a recessive trait are often called carriers of that trait. what does that mean? 9. in peas, green pods (g) are dominant over yellow pods. if a homozygous dominant plant is crossed with a homozygous recessive plant, what will be the phenotype of the f1 generation? if two plants from the f1 generation are crossed, what will the phenotype of their offspring be?
The observed phenotypes is the same as the ratio of predicted phenotypes due to Punnett square and prediction techniques.
What is a phenotype?A phenotype simply means the observable traits such as eye color, height, and blood type.
In this case, the observed phenotypes is the same as the ratio of predicted phenotypes due to Punnett square and prediction techniques.
The difference between genes and allele is because an allele is a variant form of a gene. Mutation affects protein synthesis as it can lead to malfunction.
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In the late 1960s, carroll williams and karel salma discovered that the insect pyrrhocoris apterus, when grown in jars with paper towels made from balsam fir, underwent several extra larval molts and finally died without completing metamorphosis. further investigation led to the conclusion that the fir trees synthesize a hormonal analog that acts as an insecticide. which hormone is this natural insecticide mimicking?
I don’t know what the answer is I wish I could help
Which biome has the highest diversity of species?
A. Savanna
B. Temperate rain forest
C. Tropical rain forest
D. Desert
Answer:
C. Tropical rain forest is a correct answer
Explanation:
Tropical rain forest biome has the highest diversity of species.
The tropical rain forest has the following characteristics,which make them have the highest diversity of species
it is the oldest biome, they have more time to diversify and ecological obstacles are less.Tropical rain forest each year they receive heavy rainfall, and the climate of the tropical region is favorable for the existence of a large number of species.As the tropical rain forest is located in the tropical region, they get sufficient sunlight and it is converted into energy by plants by the method of photosynthesis, this result in the availability of lots of energy in the tropical rain forest which supports an abundance of animal and plant species.Thus this is the reason Tropical rain forest biome has the highest diversity of species.
Tropical rain forests are known for having the highest diversity of species among the listed biomes.
These lush and biodiverse ecosystems are characterized by high temperatures, abundant rainfall, and year-round growing seasons, creating ideal conditions for a wide variety of plant and animal life to thrive.
Tropical rain forests are found near the equator in regions of South America, Central America, Africa, Southeast Asia, and Oceania. They harbor an incredible array of plant species, with dense vegetation layers and multiple niches that support a wide range of flora and fauna. The combination of warm temperatures, high humidity, and ample rainfall provides the necessary conditions for an abundant and diverse plant life, including numerous tree species, epiphytes, and understory plants.
In turn, the diverse plant life in tropical rain forests supports a rich and varied animal community. These forests are home to countless species of insects, birds, mammals, reptiles, and amphibians. It is estimated that more than half of the world's known species reside in tropical rain forests, despite covering only a small percentage of the Earth's land surface.
The combination of diverse habitats, stable climate, and ample resources in tropical rain forests creates an ecosystem that fosters speciation and provides a haven for countless species to coexist. However, tropical rain forests are also under significant threat from deforestation, habitat loss, and climate change, which poses a risk to the rich biodiversity they support. Conservation efforts are crucial to preserving these irreplaceable hotspots of life on our planet.
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Antoni van leeuwenhoek was the first person in history to
Answer:
Observe mircroorganisms, specifically bacteria.
Explanation:
Antonie Van Leewenhoek is known to be the "Father of Microbiology." He observed them using his own version of the microscope. He called them animalcules. He used his microscope to count the number of microorganisms he observed in samples of water. It was on September 17, 1676 when he proclaimed that bacteria existed.
Antoni van Leeuwenhoek was the first person in history to observe and describe microorganisms using single-lens microscopes he designed himself, marking notable advances in microbiology.
Explanation:Antoni van Leeuwenhoek holds a significant place in history as he was the first person to observe and describe microorganisms. Using single-lens microscopes of his own design, he was the first to experiment and validate the existence of bacteria, protozoa, spermatozoa, and blood cells. His discovery laid the foundation for the subsequent development of the field of microbiology.
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Consider this animal cell. Which organelles are labeled G? a) centrioles b)lysosomes c)endoplasmic d)reticulum-mitochondria
The organelles are labeled as reticulum-mitochondria.
What are organelles?Inside cells, organelles were specialized structures that carry out a variety of tasks. Literally, the phrase refers to "tiny organs." Organelles provide specialized functions to keep a cell alive, much like organs like the heart, liver, stomach, as well as kidneys, which serve different functions to keep an individual alive.
What are mitochondria?The majority of eukaryotic creatures contain a double-membrane-bound organelle known as a mitochondrion. The majority of the cell's adenosine triphosphate, which is being used as a source of chemical energy all across the cell, has been produced by mitochondria using aerobic respiration.
Therefore, the organelles are labeled as reticulum-mitochondria.
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What is the most likely position for the hurricane indicated by the wind readings from the three weather stations shown?
A) 22 degrees north, 79 degrees west
B) 23.5 degrees north, 77 degrees west
C) 25 degrees north, 75 degrees west
D) 25 degrees north, 79 degrees west
Answer: Your answer would be B!
Explanation:
Which of the following characteristics of Taq polymerase make it useful in the PCR process?
A. Only minute amounts are needed for each cycle of PCR.
B. It binds more readily than other polymerases to the primers.
C. It is heat stable and can withstand the heating step of PCR.
D. It has regions that are complementary to the primers.
Answer:
The correct option is C.
Explanation:
Polymerase Chain Reaction (PCR) is a biotechnological method that is used to amplify the quantity of specific DNA sequences in the laboratory. The method requires the use of a DNA polymerase that can replicate the DNA sequences. The Taq polymerase is a good fit for this requirement because it has a thermo-stable DNA polymrase, which can withstand the heating step of PCR. The bacteria T aquaticus from which the DNA polymerase was extracted lives in hot springs and hydro-thermal vents, this makes it possible for it to withstand high temperature.
How many chromosomes are found in human gametes
Answer: Humans have 23
The pesticide DDT was widely used in the 1940s as a method of insect control. In the late 1950s the first DDT-resistant mosquitoes were discovered, and eventually DDT-resistant mosquitoes were found globally. When DDT is used now, the development of DDT resistance in mosquito populations occurs in months rather than years.
Which of the following best explains the observations concerning DDT resistance in mosquitoes?
A. Competition for limited resources causes mosquitoes to migrate to geographical areas that have richer supplies of DDT
B. The proportion of DDT-resistant mosquitoes in a population remains constant due to the metabolic costs of DDT utilization
C. Natural selection favors DDT-resistant mosquitoes that are already present in a population when DDT exposure occurs
D. DDT is a chemical signal that delays normal reproductive cycles in many mosquito populations
Answer:
C. Natural selection favors DDT-resistant mosquitoes that are already present in a population when DDT exposure occurs
Explanation:
Natural selection is evolutionary mechanism which favours traits of an organism that help them survive and reproduce. In the example, above, DDT resistant mosquitoes will survive after the use of pesticide. The mutation that lead to the resistance is favourable by natural selection.
Lysozyme is found in tears and saliva. it is a chemical produced by cells in your body and is considered a nonspecific immune defense. lysozyme kills bacteria by attacking their cell walls, making the bacteria more vulnerable. why is lysozyme considered a nonspecific response to infectious agents?
Answer: Because it attacks more than one type of bacteria, if it only attacked one type it would be specific
Explanation:
Lysozyme is a nonspecific immune defense because it doesn't target any specific bacteria. It destroys the cell walls of a broad range of bacteria, acting as a general defense mechanism.
Explanation:Lysozyme is considered a nonspecific response to infectious agents because it doesn't target any specific bacteria, but rather a broad range of them. This means it serves as a general defense mechanism rather than a specialized one. Once it encounters any bacteria, it acts the same way, by destroying the cell walls, regardless of the type of bacteria. Hence, it does not have the ability to differentiate between various kinds of infectious agents.
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Which of these is the best example of Newton's third law?
A hockey puck sliding across the ice
A basketball bouncing on the court
A football spiraling through the air when thrown
A soccer ball being caught by a goalie
Answer:
a basketball bouncing on the court
Explanation:
because when the ball bounce on the ground it bounce back up
that shows that every action there and equal and opposite reaction
Ddt is harmful to the environment because it
What do you mean with “ddt” ?
After a major forest fire, the process of succession begins in an ecosystem.
Which best describes how succession changes the ecosystem?
O
A. The ecosystem becomes more stable and diverse.
O
B. The ecosystem becomes more disturbed.
O
C. The ecosystem has fewer species.
O
D. The ecosystem has less biodiversity.
SUBMIT
Answer:
The ecosystem becomes more stable and diverse.- A.
The best answer is:A. The ecosystem becomes more stable and diverse.
As the process of succession occurs, the ecosystem becomes more stable and diverse. This is because different species colonize the area at different stages of succession, leading to an increase in the number and diversity of species present.
Thus, While succession can be seen as a disturbance in the short term, in the long term, it leads to greater stability and biodiversity in the ecosystem. Therefore, options B, C, and D are not correct.
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If an egg rolls out of a nest, a mother greylag goose will retrieve it by nudging it with her beak and head. if researchers remove the egg or substitute a ball during this process, the goose continues to bob her beak and head while she moves back to the nest. explain how and why this behavior occurs.
Answer:
The proximate explanation for this fixed action pattern might be that nudging and rolling released by the sign stimulus of an object outside the nest, and the behavior is carried to completion once initiated. The ultimate explanation might be that ensuring that eggs remain the nest increased the chance of producing health offspring.
Which of the following statements about metabolic rate is FALSE? Metabolic rate may be measured by determining the rate of oxygen consumption. The metabolic rate per gram of tissue in ectotherms is dependent on external temperature. An organism's overall metabolic rate increases with the animal's mass. The metabolic rate per gram of tissue is greater in endotherms than in ectotherms. The metabolic rate per gram of tissue is greater in large endotherms than in small endotherms.
Answer:
The metabolic rate per gram of tissue is greater in large endotherms than in small endotherms.
Explanation:
Metabolic rate is a measurement of metabolism in animals: how much energy is used per time. Energy used on a daily level is described as basal metabolic rate. Among both, endotherms (maintain their own heat) and ectoterms (depend on external heat) metabolic rate depends on animal's activity, active animals have higher metabolic rate.
Metabolic rate in ectoterms vary with temperature, while in endoterms it does not.
The false statement is: 'The metabolic rate per gram of tissue is greater in large endotherms than in small endotherms'. This is incorrect as smaller endothermic animals have a higher Basal Metabolic Rate (BMR) per body weight than larger ones.
Explanation:The statement that is FALSE about metabolic rate is: 'The metabolic rate per gram of tissue is greater in large endotherms than in small endotherms'. The metabolic rate, or the amount of energy expended over time, is measured in joules, calories, or kilocalories. It's key to distinguish between endothermic and ectothermic organisms. The metabolic rate per gram of tissue in endotherms is generally greater than in ectotherms.
However, endothermic organisms vary based on size. Smaller endothermic animals have a higher Basal Metabolic Rate (BMR) per body weight than larger ones, primarily because smaller animals have a greater surface area for their mass, which leads to faster heat loss and increased energy need to maintain a constant internal temperature.
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Sally has a large yard around her house how could she use that to live more sustainably
Final answer:
Sally can live more sustainably by developing a low-water, low-space, and low-cost garden, practicing no-till gardening, planting native species for conservation, and managing waste effectively if she has livestock.
Explanation:
Sally can use her large yard to live more sustainably by implementing various environmentally friendly practices. She could create a garden that does not require much water, space, or money to develop, and is designed to minimize the presence of weeds. To further the sustainability of her yard, integrating native plants can support local ecology and help conserve species. Additionally, by practicing no-till gardening, reducing lawn areas, and possibly using container gardens or raised beds, she can produce her own food and reduce the environmental impact significantly.These practices are not just beneficial for individual health and well-being but also contribute to larger environment preservation efforts. As per the eco-urbanist manifesto, densely populated areas can be efficient in energy conservation; hence, Sally's actions although on a smaller scale, contribute to this wider principle of sustainability. If Sally has livestock, implementing sustainable practices like minimal tillage agriculture and proper waste management can transform her yard into a self-sufficient ecosystem, further enhancing her contribution to environmental conservation.
Michaela is starting a farm and wants to ensure that the soil will hold enough moisture for her crops. Which strategy would most likely help her to retain soil moisture? 1Points A find a farm with sandy soil B farm an area with a deep soil layer C increase the size of the particles D plant crops with larger seeds
Answer:
A. find a farm with sandy soil
Explanation:
Sandy soil helps keep moisture retention
In order to retain moisture, the farmer must farm an area with a deep soil layer.
Soil refers to the outermost layer of the earth's crust on which plants grow. The soil supports the growth of plants as well as retains moisture for the plants. This moisture is very necessary for plant growth.
However, sandy soil does not retain moisture because it is porous. In order to retain moisture, the farmer must farm an area with a deep soil layer.
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A stickleback fish will attack a fish model as long as the model has red coloring. What animal behavior idea is manifested by this observation?
Answer:
Sign stimulus
Explanation:
Sign stimulus is a stimulus that will always produce the same behavioral response of an organism. In this case, red coloring is a sign stimulus for the fish attack which is its behavioral response.
This type of innate behavior is called Fixed Action Pattern (FAP) because it is always the same (there is usually no variants in the behavioral response actions). If the model is colored differently, there is no behavioral response (attack).
Zach wants to run an experiment on reaction rates. He designs an experiment testing the reaction rate changes when magnesium and hydrochloric acid react. He decides to run one trial with magnesium ribbon and 1.0 M HCl. For his second trial he rolls the magnesium ribbon into a tight coil and reacts it with 2.0 M HCl. In the third trial, Zach cuts the same amount of Magnesium into slivers and reacts them with 3.0 M HCl. What is the problem with Zach's experimental design?
Answer:
The correct answer would be - there are two variable parameters in the experiment.
Explanation:
Zach wants to test the reaction rate of the magnesium and hydrochloric acid. In the experiment of the Zach, there are at least two different variable categories namely, concentration and surface area of the reactants.
Both the parameters of the reactants which are magnesium and hydrochloric acid will influence the rate of the reaction altogether. If concentration and surface area both are in experiment design, you can not depend on the rate of reaction due to both variables influence the rate of reaction.
Thus, the correct answer is - there are two different variable parameters in the experiment.
The problem with Zach's experimental design is that he's changing multiple variables at once. To accurately evaluate the impact of each variable on the rate of reaction, only one factor should be changed at a time while others remain constant.
Explanation:The problem with Zach's experimental design is that he's changing too many variables at once, namely both the physical state of the magnesium and the concentration (molarity) of the hydrochloric acid. In order to evaluate the impact of each individual variable on the rate of reaction, it is crucial to change only one factor at a time. For example, in the first trial he could use a magnesium ribbon with 1.0 M HCl, then in the second trial use the same magnesium ribbon with 2.0 M HCl. This way, the only variable changing is the molarity of the hydrochloric acid. Similarly, he could just compare the reaction rate differences between magnesium in different physical states (ribbon, coil, slivers) with the concentration of HCl constant. By doing so, it becomes possible to isolate the effects of each variable to accurately evaluate their role in affecting reaction rate.
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The fact that all seven of the pea plant traits studied by Mendel obeyed the principle of independent assortment most probably indicates which of the following? The fact that all seven of the pea plant traits studied by Mendel obeyed the principle of independent assortment most probably indicates which of the following? Some traits obeyed the law of segregation and some did not. All of the genes controlling the traits were located on the same chromosome. None of the traits obeyed the law of segregation. All of the genes controlling the traits behaved as if they were located on different chromosomes.
The seven pea plant traits studied by Mendel obeyed the principle of independent assortment because all the genes controlling the traits behaved as if they were located on different chromosomes. Mendel's principles of segregation and independent assortment shows that genes segregate equally into gametes. Despite questions about potential linkage, Mendel's observations can be attributed to the recombination effect.
Explanation:The fact that all seven of the pea plant traits studied by Mendel obeyed the principle of independent assortment most likely indicates that all of the genes controlling the traits behaved as if they were located on different chromosomes. This stems from Mendel's principles of random segregation and independent assortment, where each parent passes one allele for every gene on to offspring, with offspring equally likely to inherit any combination of allele pairs.
While Mendel's work did not discuss linkage, and researchers have questioned if he encountered linkage but didn't publish those crosses, it's plausible that Mendel simply did not observe linkage due to the extensive recombination effect.
Furthermore, observing the principles of segregation, Mendel proposed that paired unit factors (genes) segregate equally into gametes, supporting the observed 3:1 phenotype ratio. Hence, all these principles cumulatively can infer that the genes in Mendel's text behaved as if they were on different chromosomes.
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Is the evolution of teosinte into maize an example of gradualism or punctuated equilibrium?
The evolution of teosinte into maize could be an example of either gradualism or punctuated equilibrium, and the question remains debated in scientific communities. Both theories describe different processes and rates at which evolutionary changes can occur, reflecting the complexity of evolutionary dynamics.
The question whether the evolution of teosinte into maize is an example of gradualism or punctuated equilibrium pertains to the two theories of evolutionary change. Gradualism proposes a continuous and slow change over time while punctuated equilibrium suggests long periods without significant change interspersed with rapid changes.
Looking at the fossil record, instances of the punctuated equilibrium model often appear where there are long periods of stasis followed by rapid and massive change. Gradualism, on the other hand, would show a slow accumulation of changes over a much longer period. Since research indicates that both sudden changes and more gradual transformations have played a role in speciation, with evidence of varying rates of evolution tied to factors like mutation rates and selection pressures, it’s clear that both processes have occurred throughout the history of life. The case of maize's evolution from teosinte is still a topic of scientific discussion and may not fit neatly into either category.
The evolution of teosinte into maize showcases aspects of both gradualism and punctuated equilibrium, with evidence from the fossil record indicating a complex pattern of evolutionary change.
The evolution of teosinte into maize is a debate between gradualism and punctuated equilibrium. Gradualism posits that species evolve through continuous and slow processes. In contrast, punctuated equilibrium suggests that species remain unchanged for long periods and evolution happens in rapid bursts, influenced by significant changes such as environmental pressures or allopatric speciation. The evolution of teosinte into maize doesn't conform strictly to one model but may exhibit traits of both, with a general trend towards gradual change peppered with periods of rapid evolution.
Observations suggest that while there can be long periods of little to no change, as in punctuated equilibrium, there are also phases where gradual changes accumulate over time. The fossil record, including that of teosinte and maize, often shows these patterns, indicating a complex evolutionary history that may not fully adhere to a single theory.
The methylation state of an individual CpG island:
is fixed; such genes are permanently turned off.is fixed, but this has no effect on whether genes are expressed.can change over time in response to environmental cues, but this has no effect on gene expression.can change over time in response to environmental cues, allowing genes to be turned on or off as needed.is random sometimes the cytosines are methylated and sometimes they're not, but the state is independent of the environment or cell type.
Answer:
can change over time in response to environmental cues, allowing genes to be turned on or off as needed
Explanation:
DNA methylation is a process of gene expression regulation. It involves the methylation (addition of methyl groups) of the DNA which usually repress gene transcription.
CpG islands are DNA sequences rich in C and G nucleotides, in the form of repeating dinucleotides. They are often found within the promotor of the gene. CpG islands (more preciesly citosine in CpG) can be methylated by DNA methyltransferases. That methylation can change te gene expression and this type of regulation is called epigenetics.
The methylation state of a CpG island, influenced by environmental cues, regulates gene expression. Methylated CpG islands usually lead to gene silencing whereas unmethylated ones often result in gene activation. DNA methylation is a mechanism for controlling gene 'on' or 'off' states.
Explanation:The methylation state of an individual CpG island can indeed change over time in response to environmental cues. This change plays a significant role in the regulation of gene expression. When the CpG islands in a gene promoter region are methylated, it generally leads to the gene being turned off or 'silenced'. On the contrary, when the CpG islands are unmethylated, genes are usually active or 'expressed'. However, these methylation patterns are dynamic and subject to change based on signals from the environment and during different stages of development. To put it simply, DNA methylation is one of the ways by which cells control whether genes are 'on' or 'off.'
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Which of the following is an example of a feedback loop in the body?
A.
The pancreas can be endocrine and exocrine.
B.
The nervous system sends a signal to produce hormones.
C.
The body produces adrenaline when a person is scared.
D.
The thyroid gland reverses the action of the parathyroid gland.
The correct answer is D because this helps it maintain homeostasis
The feedback loop is the mechanism of product amplification or inhibition. The thyroid gland switches the activity of the parathyroid gland is an example of the feedback loop.
What is a Feedback loop?The product of the biological reactions enhances the overall reaction system or can inhibit the system reaction. They can be positive and negative feedback loops.
The feedback mechanism checks and regulates homeostasis and thermoregulation of the body. In the human body, the thyroid and the parathyroid gland acts and produces hormones based on the feedback mechanism.
Therefore, option D. production of the thyroid gland inhibits and reverses the action of the parathyroid glands.
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A cylindrical blood vessel is partially blocked by the buildup of plaque. at one point, the plaque decreases the diameter of the vessel by 60%. the blood approaching the blocked portion has speed v0. 1) just as the blood enters the blocked portion of the vessel, the blood's velocity will
As the plaque causes a reduction in the diameter of a blood vessel, the blood's velocity increases when it enters the blocked portion of the vessel. This is due to the conversational law of fluid dynamics that maintains the consistency of the flow rate.
Explanation:This question is a direct application of Bernoulli's equation and the principle of the conservation of mass, specifically applied to the fluid dynamics of the circulatory system. When the plaque decreases the diameter of the cylindrical blood vessel by 60%, the cross-sectional area of the vessel also decreases. As a result, according to the formula Q=Av (Q is the flow rate, A is the cross-sectional area, and v is the velocity), the velocity of the blood increases as it enters the blocked portion of the vessel to keep the rate of flow Q consistent.
Every part of the circulatory system from the main artery, such as the aorta, to smaller arteries, to tiny vessels like the capillaries, illustrates some aspect of fluid dynamics. When the diameter of the blood vessels changes, like when plaque builds up in an artery, it influences the speed of blood flow due to the inverse relationship between cross-sectional area and velocity.
So, in this case 1) just as the blood enters the blocked portion of the vessel, the velocity of the blood will increase. This principle helps to understand various cardiovascular processes and conditions, including the effects of plaque buildup in arteries.
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DDT (dichlorodiphenyltrichloroethane) is a manmade pesticide that was designed to kill insects that carried diseases. However, the pesticide was found to cause mutations to both body cells and sex cells in other organisms. Because of this, DDT is now banned in most countries around the world.
How are mutations to reproductive cells, or gametes, different than mutations to other cells in the body?
I. Mutations to reproductive cells can be passed on to offspring.
II. Mutations to body cells can be passed on to offspring.
III. Mutations to body cells are more harmful than mutations to reproductive cells.
IV. Mutations to reproductive cells are usually beneficial to offspring.
--
A.
I, II, and III only
B.
II and III only
C.
I, II, III, and IV
D.
I only
Answer:
I. Mutations to reproductive cells can be passed on to offspring.
Explanation:
Option B) Mutations in reproductive cells can be inherited by offspring, while mutations in body cells only affect the individual.
Mutations to reproductive cells, or gametes, are different from mutations to other cells in the body because only mutations to reproductive cells can be passed on to offspring. When mutations occur in somatic cells (non-reproductive cells), they affect only the individual in which they occur and are not inherited by future generations. However, mutations in reproductive cells can be transmitted to offspring during reproduction, potentially leading to genetic disorders or other hereditary traits.
The statement "Only mutations to reproductive cells can be passed on to offspring" accurately reflects this distinction. The other options presented are not accurate representations of the differences between mutations in reproductive cells and mutations in other cells in the body.
Complete Question:
If the codon reads AAU and the anticodon reads UUA, what is the correct amino acid?
Question 9 options:
asparagine
leucine
phenylalanine
lysine
Answer:
Explanation:
Asparagine
How many pairs of chromosomes do humans have?
Answer:
23 pairs
Explanation:
Chemical digestion in the small intestine involves ________. a. a significant amount of enzyme secretion by the intestinal mucosa b. cholecystokinin (CCK), an intestinal hormone responsible for gallbladder contraction c. secretions from the spleen that contain all enzymes necessary for complete digestion d. bile salts that help emulsify carbohydrates so that they can be easily digested by enzymatic action
Answer:
b. cholecystokinin (CCK), an intestinal hormone responsible for gallbladder contraction
Explanation:
Chemical digestion is the process that involves the breakdown of chemical bond that holds food particles together into small parts to nourish the cells in the body. Thus, almost all chemical digestion takes place in the small intestine and enzymes used for the purpose of digestion are usually secreted by the pancreas which enters the small intestine through pancreatic duct. Furthermore, the entrance of digestive enzymes into the small intestine can only occur only when cholecystokinin hormone is secreted which is responsible for digestion of fats and protein.
Chemical digestion in the small intestine involves enzyme secretion, bile salts, and cholecystokinin.
Explanation:Chemical digestion in the small intestine involves a significant amount of enzyme secretion by the intestinal mucosa. The enzymes help break down complex molecules into simpler forms that can be easily absorbed by the body. This includes enzymes such as amylase, lipase, and proteases.
Bile salts, not secretions from the spleen, are responsible for emulsifying fats and aiding in their digestion. Bile salts help break down larger fat droplets into smaller ones, increasing the surface area for enzymatic action.
Cholecystokinin (CCK) is an intestinal hormone that stimulates the secretion of bile from the gallbladder. Bile is important for the digestion and absorption of fats. It also slows down gastric emptying and reduces appetite.
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Fertilization takes place when (2 points)
the egg is split in two
sperm is formed
chromosomes are formed
the sperm enters the egg
the sperm enters the egg
Which section of colon is directly before the rectum
Answer:
Sigmoid colon
Explanation:
Colon is the part of the final section of the digestive tract (large intestine). Its main role is water reabsorption and removal of wastes. The sections of the colon are:
cecum and appendix-the begining and the connection with the small intestineascending colon-its role: removes the water and the nutrients and recycle ittransverse colondescending colon-it stores the wastes before their excretionsigmoid colon (s-shaped)-muscular section for the removal of fecesrectum-final elimination of wastes.