Answer:
a. diploid
Explanation:
After the fertilization process between haploid egg cell and haploid sperm cell, diploid zygote is formed. Zygote has two sets of chromosomes (one from each gamete) which means it is diploid. Sporophyte stage of life cycle will develop from diploid zygote. During the life cycle of a plant (or algae) sporophyte phase alternates with a gametophyte phase which is haploid. In both, seed plants and flowering plants sporophyte phase (roots, stem, leves, cones/flowers) is more prominent than gametophyte phase (pollen, embryo sac).
Sporophyte phase produces spores via meiosis that develop into gametophte.
The rate at which blood flows through the human body changes in response to many factors. Which statement describes one of these factors and its effect on blood flow?
A. A high viscosity of blood causes an increased resistance in the blood vessels and leads to slow blood flow.
B. A low blood pH decreases the rate of diffusion through the blood vessels and leads to slow blood flow.
C. The changing of the shape of red blood cells to a crescent shape decreases resistance and lead to a faster blood flow.
D. The narrowing of blood vessels increases pressure and leads to a faster blood flow.
Answer:
Im waiting on an answer aswell.
Explanation:
Answer:A. A high viscosity of blood causes an increased resistance in the blood vessels and leads to slow blood flow.
Explanation:
The segment of the uterine tube in which fertilization typically takes places is the
Fertilization typically occurs in the oviduct/fallopian tubes of the female reproductive system.
I hope I helped!
How many chromosomes do humans have total in each body cell?
There are 46 chromosomes in each body cell. Human gametes have 23 since they’re haploid cells though
There are 23 chromosomes in each human cell
THE HARDEST QUESTION IN THE WORLD!!!
Astronomers use numbers to rank apparent magnitude. The larger the number, the dimmer the star appears in Earth’s sky. Which three adjectives apply to a star with a very high ranking of apparent magnitude?
A) large, massive, and very far from Earth
B) small, hot, and massive
C) small, cold, and very far from Earth
The answer is C.
A very high magnitude star is difficult to see from Earth. That’s because it is very far away. A star that far away won’t be able to radiate heat like those that are closer to Earth.
Which describes why nonrenewable energy resources are used more frequently than renewable ones? They are inexpensive to use. Most are nonpolluting. They are easier to locate. They are easier to replace.
they are inexpensive.
Please I only have a few minutes left!
Study the image. (the one with the moon)
Which phase of the moon is shown?
full moon
first quarter
waning gibbous
waxing crescent
~~~~~~~~~~~~~~~~~~~~~~
Look at the diagram of a solar eclipse.
(the one with the sun and earth)
At which location is the solar eclipse viewed in totality?
1
2
3
4
First answer: waxing crescent.
Second answer: Best answer is 2 for sure
A major function of glycoproteins and glycolipids in the cell membrane is to
Answer:
be part of the cell signaling process
Explanation:
Glycoproteins and glycolipids are proteins and lipids with carbohydrate chain attached to it. They are an important component of the cell membrane with many roles:
stabilizing membrane structure-because of their ability to bind water molecules via hydrogen bondscell signaling-they are often membrane receptors for the hormones and neurotrasmitterscell attachment (adhesion)-for the connection between cellscell recognition-they can act as antigens on the cell surface (immune role)Glycoproteins and glycolipids in the cell membrane function to aid cell identification and interaction with the environment. They form the glycocalyx, which facilitates cell recognition, communication, and attachment. Additionally, they assist in maintaining fluid balance and performing various roles related to nutrient breakdown and hormone reception.
Explanation:A major function of glycoproteins and glycolipids in the cell membrane is to facilitate cell identification and interaction with the external environment. Together, they form the glycocalyx, a carbohydrate-rich coating that aids in cell-cell recognition, interaction, and adhesion. The glycocalyx distinguishes one cell from another, allowing immunity cells to differentiate between 'self' and 'non-self' cells and to communicate with the external environment effectively.
These proteins and lipids also play an important role in maintaining fluid-electrolyte balance, as they attract large amounts of water to the cell's exterior surface. This not only aids in interaction with the watery environment but also helps the cell to obtain substances dissolved in water.
Furthermore, the carbohydrate tags on glycoproteins in particular can serve different functions, such as binding to another cell, containing receptors for hormones, or having enzymes to break down nutrients.
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Investigations were carried out in a science lab to explore the topic of chemical and physical changes. Investigation A Step 1. Add 5 tsp. Salt to 100 ml warm water and stir until most or all of the salt is no longer visible. Step 2. Heat the salt solution on a burner until only a white solid remains. Investigation B Step 1. Mix 10 tsp. White sugar into 100 ml water and stir until most or all of the sugar is no longer visible. Step 2. Heat the sugar solution on a burner until the solution thickens and turns brown. In which step(s) did a chemical change most likely occur? Investigation A, Step 1 and Investigation B, Step 1 Investigation A, Step 2 and Investigation B, Step 2 Investigation A, Step 2 only Investigation B, Step 2 only
Answer:
a
Explanation:
on edge
In Investigation A, a physical change occurs in Step 1 when salt is dissolved in water, followed by a chemical change in Step 2 when the solution is heated until only a white solid remains. In Investigation B, sugar dissolving in water (Step 1) is a physical change but the solution thickening and turning brown when heated (Step 2) is a chemical change.
Explanation:A chemical change occurs when a new substance is formed through a chemical reaction, while a physical change does not involve any substance's identity change, such as changes in state or phase transitions. For Investigation A, when salt is dissolved in water (Step 1), it is a physical change. But when the salt solution is heated until only a solid remains (Step 2), that suggests a new substance has been formed, hence indicating a chemical change.
For Investigation B, the sugar dissolving in water (Step 1) would be a physical change. However, in Step 2, where the sugar solution thickens and turns brown on heating, suggests a change in substance and hence is a chemical change. This brown substance is often referred to as caramel, which has a different composition than the original sugar.
Data from lab investigations, like the examples given with phase transitions and the spontaneous chemical change experiment, serve as the foundational understanding behind these chemical and physical changes.
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The use of ladybugs and praying mantises to consume insect pests in gardens is an example of
Answer:
The use of ladybugs and praying mantises to consume insect pests in gardens is an example of biological control of insect pets.
This is the example of Biological control of pest.
In biological control, the use of living organisms to control pests.What are the benefits of using biological control of pest?Biological control is the use of living organisms to suppress pest populations, making them less damaging than they would otherwise be. Natural enemies of insects play an important role in limiting the densities of potential pests. These natural enemies include predators, parasitoids, and pathogens.What is pest?A pest is any organism that spreads disease, causes destruction or is otherwise a nuisance.Some examples of pests are mosquitoes, rodents and weeds. Not all insects are pests
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The amount of filtrate produced by the kidneys each minute is called thea. autoregulation capacity.b. glomerular filtration rate.c. corpuscular output.d. net filtration pressure.e. filtration ratio.
Answer:
b. glomerular filtration rate
Explanation:
Glomerular filtration rate is a measure of blood filtration per minute.
When blood enters the glomerulus, it has some pressure which is called outward pressure. Opposite to this pressure, inward pressure consists of colloidal osmotic pressure and capsular hydrostatic pressure.
The net filtration pressure is the difference between outward and inward pressure.
Glomerular filtration rate is highly regulated by kidneys themselves (constriction and dilatation of afferent arteriole), via neural or hormonal control (e.g. via atrial natriuretic peptide).
For a short lived climate pollutants (SLCPs) persist in the atmosphere for a few days to a few __
Answer:
The given blank can be filled with few decades.
Explanation:
The SLCPs or the short-lived climate pollutants remain in the atmosphere for a few days to a few decades, and they are the prime reason for global warming. The tropospheric ozone, black carbon, hydrofluorocarbons, and methane are all regarded as SLCPs, as these pollutants exhibit atmospheric lifetimes of a few days to few decades. These short-lived pollutants are responsible for 40 to 45 percent of global warming.
Answer:
Short-lived climate pollutants (SLPs) persist in the atmosphere for a few days to a few decades, and they make the climate warm.
How many inches is the longest tail on a dog
30.2 inches is the world record for the longest dog’s tail.
Which natural resource is known as the kidneys of the environment? A.fisheries B.wetlands C.soil D.natural parks E.wildlife
Wetlands are also called the natural kidney of environment because they perform the same functions of absorbing the wastage like nitrogen and phosphorus as our kidney do.
Answer:
B. Wetlands.
The Wetlands are known as the kidneys of the environment because of the natural process that take place within the wetlands.
How do scientists make viruses more visible
I don’t know I did not even know they do that
Why is living in a large pride beneficial to lions?
Larger prides never experience scarcity of food.
Male lions in a pride learn better hunting skills than males living alone.
Hunting success in a pride increases as the number of females increases.
Female lions in a pride can take care of the cubs while the males hunt.
Answer:
male lions have females that they can mate with to relive all that tension in their balls that has been building up
Explanation:
#ballsdeepnosleep
Larger prides never experience scarcity of food.
Suppose a cancerous tissue with an initial cell division rate of 52% has since undergone several successful radiation treatments. Based on the data in Table 1, what is the likely percentage of resting cells in the tissue after it has been treated?
7%
40%
80%
99%
Likely percentage of resting cells after treatment is 80%, as radiation reduces actively dividing cells significantly.
To solve this problem, let's go through each option and justify whether it is correct or not based on the given information.
Given:
Initial cell division rate = 52%
We know that the remaining cells after treatment will mostly consist of resting cells, as radiation primarily affects actively dividing cells.
Option 1: 7%
If only 7% of the cells were resting, it would imply that 93% of the cells are still actively dividing after treatment. This is unlikely because radiation treatments tend to reduce the population of actively dividing cells significantly. Therefore, Option 1 is unlikely.
Option 2: 40%
If 40% of the cells were resting, it would imply that 60% of the cells are still actively dividing after treatment. While radiation treatments do reduce the population of actively dividing cells, it's possible that a significant portion may still remain. Therefore, Option 2 is plausible but not necessarily the most likely.
Option 3: 80%
If 80% of the cells were resting, it would imply that only 20% of the cells are still actively dividing after treatment. This seems more likely because radiation treatments are designed to target actively dividing cells, leading to a higher percentage of resting cells remaining. Therefore, Option 3 is a plausible choice.
Option 4: 99%
If 99% of the cells were resting, it would imply that only 1% of the cells are still actively dividing after treatment. While radiation treatments do reduce the population of actively dividing cells significantly, it's highly unlikely that such a small percentage would be left. Therefore, Option 4 is unlikely.
Based on the given data and reasoning, the most likely percentage of resting cells in the tissue after treatment is Option 3: 80%.
How do populations of organisms change over time?
When there is a modification in the characteristics of an organism over several years is called evolution. It gets inherited and the traits get passed from the parent to their offspring.
The populations of the organism change over time due to:
Evolution
This change can be explained as:
Over generations, the population of species changes due to modification in genetic materials and reflects the adapted changes beneficial for their survival.The species to survive in conditions not favourable modifies itself to adjust and accumulate the beneficial genes over time.Therefore, evolution changes the species over time.
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Populations are dynamic entities that fluctuate based on various factors like environmental changes, natural disasters, and competition for resources. The field of demography uses mathematical tools to study how populations respond to changes in their environment.
Explanation:Populations are dynamic entities. Populations consist all of the species living within a specific area, and populations fluctuate based on a number of factors: seasonal and yearly changes in the environment, natural disasters such as forest fires and volcanic eruptions, and competition for resources between and within species. The statistical study of population dynamics, demography, uses a series of mathematical tools to investigate how populations respond to changes in their biotic and abiotic environments. Many of these tools were originally designed to study human populations. For example, life tables, which detail the life expectancy of individuals within a population, were initially developed by life insurance companies to set insurance rates. In fact while the term "demographics" is commonly used when discussing humans all living populations can be studied using this approach.
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Which explanation best fits with the data shown?
A.) Organisms use all of the chemical energy they take in for life processes.
B.) Organisms use some of the chemical energy they take in for life processes.
C.) Organisms transfer exactly 50% of their chemical energy to the next trophic level.
D.) Organisms permanently store of all the chemical energy they take in.
Answer:
B.
Organisms use some of the energy they take in for life process... Like respiration, thermoragulation, etc
What part of the human ear contains the eardrum? A. The middle ear B. The lower ear C. The outer ear D. The inner ear
Answer:
A. The middle ear
Explanation:
In the anatomy of humans and various other tetrapods, the eardrum, also called the tympanic membrane or myringa, is a thin, cone-shaped membrane that separates the external ear from the middle ear.
The “middle ear” is the part which consists of eardrum.
Option: A
Explanation:
The organ which helps humans to hear is the ear which is consisted of three parts: the outer, inner and the middle ear. The “outer ear” consists the “pinna” which projects from the “side of the head”, the “inner end” of which is “closed by the eardrum” which lies in the middle ear. The outer ear performs the task of collecting the sound waves and transferring them to the eardrum. The middle ear also consists of three tiny bones named collectively as hammer, anvil and stirrup, they are called the auditory ossicles.
Having difficulty completing daily activities of living due to a chronic condition is known as
Answer:
Could be many things such as Autism, ADHD, Epilepsy, Arthritis, Diabetes etc
Explanation:
Why are many animals expected to go extinct due to global warming?
Answer:
it would eventually get to hot for them to survive
Explanation:
Describe how you produced summated contractions with the isolated muscles and how you produced a tetanus contraction. explain how summation of twitches is accomplished in vivo and how a sustained, complete tetanus contraction is produced.
Answer:
d
Explanation:
Summation of twitches and tetanus contractions explained in muscle physiology.
Summation of twitches: Summation in vivo occurs when successive stimuli are added together, resulting in greater contraction of the motor unit due to the release of more Ca++ ions triggering additional sarcomeres to contract. This leads to increased muscle tension.
Tetanus contraction: Complete tetanus is produced when the stimulus frequency is so high that the relaxation phase disappears completely, resulting in continuous contractions. This is achieved by increasing motor neuron signaling and activating more motor units in a muscle.
Production of summated contractions and tetanus: By increasing the frequency of motor neuron signaling, muscle tension rises, leading to incomplete tetanus which further progresses to complete tetanus, producing sustained, strong muscle contractions.
A fly has two alleles for the color of its eyes. The green allele is recessive, and is represented by q. The blue allele is dominant, and is represented by p. If 20 of 100 organisms are green, what is ? Homozygous dominant + Heterozygous + Homozygous recessive 1 p+ 2pq+1
A fly has two alleles for the color of its eyes. The green allele is recessive, and is represented by q. The blue allele is dominant, and is represented by p. The value for it is 0.45.
What is hardy Weinberg principle?The law predicts that both genotype and allele frequencies will be constant because they are in equilibrium when mating is random in a large population with no disruptive factors.
Several factors, like as mutations, natural selection, nonrandom mating, genetic drift, and gene flow, have the potential to upset the Hardy-Weinberg equilibrium. By bringing new alleles into a population, mutations, for instance, disturb the balance of allele frequencies.
Hardy-Weinberg equilibrium by altering gene frequencies. This occurs because specific alleles can either benefit or impair reproductive success.
Therefore, A fly has two alleles for the color of its eyes. The green allele is recessive, and is represented by q. The blue allele is dominant, and is represented by p. The value for it is 0.45.
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Using the Hardy-Weinberg equilibrium equation, the genotype frequencies of a population can be calculated. In this case, the frequencies are approximately; homozygous dominant(blue eyes) = 0.306, heterozygous = 0.494, and homozygous recessive (green eyes) = 0.2.
Explanation:This question is about understanding genetic inheritance and the basics of population genetics. The Hardy-Weinberg equilibrium can be used for this purpose. It theorizes that both allele and genotype frequencies will remain constant in a population from generation to generation if certain conditions are met.
Given that the green allele(q) is recessive and occurs in 20 out of 100 organisms (or 0.2 of the population), q2(the rate of homozygous recessive green-eyed flies) can be calculated as 0.2. After that, we can find q as sqrt(0.2) = 0.447. Based on this, p can be found as 1 - q = 1 - 0.447 = 0.553.
With these values, we can substitute into the Hardy-Weinberg equation p2 + 2pq + q2 = 1, to get the frequencies of the other genotypes: homozygous dominant(blue/blue eyes) - p2 = (0.553)2 = 0.306; heterozygous - 2pq = 2*0.553*0.447 = 0.494.
In summary, the genotype frequencies are approximately; homozygous dominant(blue eyes) = 0.306, heterozygous = 0.494, and homozygous recessive (green eyes) = 0.2.
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Describe how the largest island of Hawaii has areas that are representative of various biomes.
The largest island of Hawaii has multiple biomes. The reason for this is the topography of the island. In the middle of the island there's an enormous very high volcano. One side of the island manages to get lot of precipitation, the windward side, thus this part of the island is dominated by dense rainforest and animals that are adapted to wet tropical conditions. The other side of the island though receives much less precipitation because the high volcano stops the wet air masses to reach it, so it is mostly dry and warm air masses that reach this part of the island, which is the leeward side. That makes it much drier, semi-arid even, thus it is dominated by grasses and animals adapted to live in that biome. The side parts of the island that are neither on the windward nor on the leeward side receive precipitation, less than the windward side, but more than the leeward side. This makes them be dominated by shrubs, with trees that are more scattered, so the fauna is adapted to this kind of more temperate conditions for living.
Answer:
what he said
Explanation:
When it rains, water collects on the surface and begins to flow downhill towards a body of water. This running water can be defined as
Answer:
a river im pretty sure or a stream
Explanation:
The fossil record shows that two groups of organisms are related, which means they share
Answer:
a common ancestor
Explanation:
When we have fossils that are very similar, exhibit the same or very similar traits, and the similarities between the fossils become greater as we go back in time, that means that the organisms are related, or rather that they share a common ancestor. The evolution works in a manner where we have one species, but because of changes in the environment, some members of the species will develop new characteristics in order to survive, thus they will become new species. As the time goes on, the species that came to be from one single species will start to look less and less alike because of the environment and what is advantageous for them to be more competitive. We can take the lynx and the smilodon for example. Both of them are part of the cat family (felidae), and they share a common ancestor around 20 million years ago, but gradually their ancestors have developed different traits, through the basic ones remained the same, with the end product being two animals from the same family that look very different.
Answer:
A on edge
Explanation:
What is the role of tRNA molecules?
t = transfer
It is used to translate mRNA by the ribosomes to make a new polypeptide.
Answer:
They package assembled proteins.
Which of the following statements is FALSE regarding water intake and output by the body?
An increase in the amount of beverages taken by mouth would increase the urine output.
An increase in fluid taken by mouth would reduce the amount produced by metabolism.
An irritation to the colon that leads to diarrhea would increase the proportion of water lost through feces.
The proportion of fluid lost by the body as sweat would increase during exercise.
Answer:
The correct option is this: AN INCREASE IN FLUID TAKEN BY MOUTH WOULD REDUCE THE AMOUNT PRODUCED BY METABOLISM.
Explanation:
Generally, the amount of water consumed by a person normally leads to increase in the amount of urine that the person will excrete, that is, the higher the quantity of water consumed, the higher the quantity of the urine that will be excreted under normal circumstances. Thus, the statement given in option B is false. The statements given in Option C and D are right; during exercise the quantity of sweat produce and lost by the body is higher than the one that is produced when one is not exercising. Also, diarrhea usually lead to loss of water from the body.
Reactions such as a candle burning give off energy in the form of heat theyre called
Answer:
exothermic reactions
Explanation:
exothermic reactions are reactions that give off heat
Blockage of the common hepatic duct would interfere with digestion of
A) proteins.
B) fats.
C) disaccharides.
D) complex carbohydrates.
E) vitamins
Answer:
B) fats
Explanation:
Common hepatic duct is s the part of the biliary tract which means that is involved in the secretion of bile.
Bile salts secreted from the bill have an important role in emulsification of lipids (fats). They have the ability to aggregate around lipids thanks to their amphipatic nature. Amphipatic nature means that they have hydrophobic side which binds directly to lipids and hydrophilic side which are faced outwards. Lipids enveloped with bile salts are called micelles.
Formation of micelles increases the surface area of fat, which is appropriate for the the action of the enzyme pancreatic lipase (perform digestion of triglycerides).