How is loess beneficial?

Answer:

a) the son will not be affected by rickets (0% chance)

b) the daughter will have rickets (100% chance)

Explanation:

Since only the father has rickets and it is a X-linked dominant trait, the mother has two normal X chromosomes. The X chromosome received from the mother by the son will not result in the rickets since the father will have contributed the Y chromosome and that does not have the gene for rickets. In case of the daughter, she will receive the defective X chromosome from her father, which will cause her to have the rickets disease.

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Answer:

The correct answer would be A) genetic engineering.

Explanation:

The correct answer is A) genetic engineering.

The following information should be considered:

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The following statements are supported by scientific evidence :  

- Members of a homologous pair must align with each other at meiosis II for healthy gametes to be produced. The normal cell division cycle (mitosis) is critical in development.

- Drug and alcohol consumption decreases male fertility.  Drugs and alcohol may affect the menstrual cycle.

-Sexually transmitted infections can cause infertility. Chlamydia and gonorrhea are sexually transmitted infections that cause infertility.  

- Women are fertile from puberty until they permanently stop menstruating.  Menopause represents the initiation of the infertile period in women.

-Developmental issues can affect fertility. Developmental disorders may affect the reproductive system and consequently affect the fertility.

-A couple's chances of achieving a pregnancy are reduced by smoking cigarettes. Cigarettes may reduce fertility in women.

A healthy body weight increases fertility, drug and alcohol consumption decreases male fertility, sexually transmitted infections can cause infertility.

A healthy body weight increases fertility can be supported by the example of exposure to toxins in cigarette smoke is thought to prematurely deplete the supply of eggs in the ovary. Similarly, drug and alcohol consumption decreases male fertility can be supported by the example of a couple's chances of achieving a pregnancy are reduced by smoking cigarettes. Additionally, sexually transmitted infections can cause infertility can be supported by the example of developmental issues can affect fertility.

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Answer:

15/16 or 93.75%

Explanation:

The proportion of the offspring of the cross expected to be red would be 15/16 or an equivalence of 93.75%.

Red fruit color is conditioned by the presence of A_, B_ or A_B_ alleles. In the absence of both dominant alleles, the condition is white. AaBb was crossed with AaBb.

AaBb   x   AaBb

Progeny' Genotype       Phenotype

1 AABB                               red

2 AABb                               red

2 AaBB                                red

4 AaBb                                 red

1 AAbb                                 red

2 Aabb                                  red

1 aaBB                                  red

2 aaBb                                  red

1 aabb                                   white

Hence, the proportion of the offspring that are expected to be red is 15/16 or 93.75%.

See the attached image for the Punnet's square analysis of the cross.

Final answer:

If two spotted-purple snapdragon plants are crossed, the expected phenotypic ratio would be 1 solid purple: 2 spotted-purple: 1 white, assuming spotted-purple is a result of heterozygous genotype.

Explanation:

If two spotted-purple snapdragon plants from the F2 generation were crossed, the phenotypic ratio of their offspring can be predicted using Mendelian genetics, but with incomplete dominance or co-dominance since we have a spotted phenotype. Assuming that the spotted-purple phenotype results from a heterozygous condition, we can denote the purple allele as 'P' and white allele as 'W'. The spotted condition could be represented by the genotype 'PW'.

When two spotted-purple plants are crossed (PW x PW), the possible genotypes of the offspring could be PP (solid purple), PW (spotted-purple), and WW (white). According to the Punnett square, the genotypic ratio would be 1 PP : 2 PW : 1 WW. Therefore, the expected phenotypic ratio would be 1 solid purple : 2 spotted-purple : 1 white.

This example showcases an inheritance pattern where three phenotypes are expressed, indicating a more complex form of inheritance than the simple dominant-recessive pattern that Gregor Mendel observed in his pea plant experiments, where typically only two phenotypes are seen.

Answer:

The answer is B.

Explanation:

Because the DNA controls the protein structure.

Answer:

B. The structure of the protein could be changed.

Explanation:

The mutation in the DNA, like other mutations, would affect the protein structure.

Answer:

Explanation:

Population density just represents the average number of individuals per unit of area. Usually, individuals of a certain population are not spread out evenly.

Population distribution describes how the individuals are distributed or spread throughout their habitat, and their most concentrated areas (where you can find a lot of them, ex. humans in the city)

Answer:

Population density is the number of individuals in a population per unit area.

Population distribution is the pattern in which individuals in a population are dispersed in an area.

Explanation: answer on e2021

Answer:

The pathways of visceral efferent 2-neurons that innervate  the smooth muscles and other effectors of the autonomic nervous system are the preganglion neuron and the post ganglion neuron. The cell body of the preganglion are in the CNS(spinal cord and brain stem) while the cell bodies of the post ganglion are located in the autonomic nervous system at the periphery of the CNS. The axon of the preganglion synapse with the dendrites of the postganglion, and with  its cell bodies. This is different from one neuron directs innervation of somatic.

This 2-step  arrangements. provides advantage of maximizing the space in the CNS, conserving it, so that the CNS is not congested, as theses neurons are  pushed to the spacious  peripheral part  of the CNS.

Thus, action potential are diverged outwards from the preganglion neurons outwards into the periphery. Which conserve space allowing the tiny periphery neurons to be stimulated,  with the aids of the  diverged circuits.Although reducing brain control.

Explanation:

Answer:

The numbers of owls will decrease

Explanation:

The numbers of owls will decrease because there are no rodents to feed them. Plant and insect populations will increase because there are no rodents to control their populations.

Answer:

The answer is B.

Explanation:

We can explain why the hens in the experimental group which received the chow with the nutritional booster lay more eggs on average than the hens in the control group with the option B. The variation in nutrition among hens is larger in the second group which is the experimental group and this leads to the difference in the number of average eggs. It does not affect heritability which should be the same in both groups.

I hope this answer helps.

Answer:

The correct terms have been inserted before the description that matches it:

Promoter

1) a DNA sequence located near the start of a gene that RNA polymerase binds to initiate transcription

Repressor

2) a regulatory protein that blocks transcription by binding to the operator site

Insulator

3) a transcriptional element that blocks the signal between enhancers and promoters

Operator

4) a gene that controls the expression of one or more genes by promoting or inhibiting transcription

Inducer

5) a small molecule that activates transcription by inhibiting the action of a repressor protein

Regulatory Gene

6) a short DNA sequence that can be recognized by a repressor protein

Notice the difference between genes and proteins, it is by working together that the cell is able to control these functions. A defect in any of these could possibly prevent the normal functioning of the cell.

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The appropriate phrases have been added before the corresponding description: Promoter.

1.a DNA sequence that RNA polymerase attaches to at the beginning of a gene to start transcription repressor.

2) A regulatory protein that attaches to the operator site and prevents transcription insulator.

3) a transcriptional component that prevents enhancers and promoters from communicating with each other Operator.

4) a gene that promotes or inhibits transcription to regulate the expression of one or more genes inducers.

5) a little chemical that prevents a repressor protein from acting, activating transcription Regulatory Gene.

6) a short DNA sequence that can be recognized by a repressor protein.

To match each term with its definition, we need to understand the basic elements involved in the regulation of transcription in DNA.

Each term plays a crucial role in controlling gene expression and ensuring the correct proteins are made at the right time in a cell.

Answer:

the answer is "natural selection"

Explanation:

Natural selection or "Option A"

Answer:

the answer to that question is a vector

Answer:

True

Explanation:

Answer:

true

Explanation:

The body eliminates nitrogenous waste through urine which is important for maintaining homeostasis in the body. The urinary system also helps control blood pressure by regulating the amount of fluid and ions in the body. Also, the kidneys produce the hormone erythropoietin which stimulates red blood cell production in the bone marrow.

Answer:

Based on the given information, the study of different varieties of the garden pea was done, that is, tall plants with round pods having homozygous genotype TTRR, and the short plants with constricted pods having homozygous genotype ttrr. Post crossing the mentioned varieties of garden pea, the F1 generation comprises tall plants with round pods having the genotype TtRr. While when the crossing of F1 generation plants was done, the plants obtained in the F2 generation demonstrated the phenotype, that is, tall plants with round pods, which is 75 in number and short plants with constricted pods, which is 24 in number.  

This shows that the genes would have been the linked genes, as they would have been situated very close together on the homologous chromosomes, and because of this linkage, the expression of the genes would have taken together.  

In case, if there was no linkage, then the genes would have assorted independently, and the offspring produced in the F2 generation would have shown the phenotypic ratio with the features of tall plants with round pods (9), short plants with round pods (3), tall plants with constricted pods (3), and short plants with constricted pods (1).  

Though the above-mentioned situation did not occur and the plants obtained in the F2 generation demonstrated the phenotype, that is, tall plants with round pods, which is 75 in number and short plants with constricted pods, which is 24 in number. This further puts more emphasis on the fact that the genes for both the phenotypes were linked due to which expression of only the mentioned two varieties took place and the other two failed to do so.  

The correct answer is D. Generate electricity.

Explanation

A hydroelectric plant is a construction in which, as its name implies, the movement of water is used to generate electricity. These are located in the cause of a river, where they dam the river water, and allow it to follow its current through a complex of tunnels where the water acquires high pressures. Later, the water meets turbines that are moved by the energy that water brings, which generates that this synthetic energy is transformed into electricity. Therefore, the option that best completes the sentence of the question is D. Moving water has been used in hydroelectric plants to generate electricity, but in recent years negative environmental consequences have been known. The environmental damages of hydroelectric plants can be alteration of terrestrial, aquatic ecosystems and their biodiversity, it also generates changes in the river regime, alteration of natural flood cycles.

Answer:

Alanine is obtained as the first amino acid, taking into account that the reaction with the Sanger reagent hydrolyzes N- (2,4-dinitrophenyl) alanine. thus with the fragments of the partial hydrolysis they are organized to create a polypetidic chain

ala-asp-gly-ala

gly-ala-phe

phe-be-wing

be-wing-phe-asp

We obtain that the correct sequence of the peptide is "ala-asp-gly-ala-phe-ser-ala-phe-asp"

The primary structure of the nonapeptide is gly-ala-phe-ser-ala-phe-asp-asp-ala, determined by the amino acid composition, Sanger's reagent labeling, and partial hydrolysis results.

The primary structure of proteins is simply the sequence in which amino acids are connected by peptide bonds. In your question regarding the primary structure of the nonapeptide, we need to determine the correct sequence of amino acids based on the given information. You provided data from a complete hydrolysis, reaction with Sanger's reagent, and results from partial hydrolysis. Sanger's reagent specifically labels the N-terminal amino acid of the peptide, which in this case is alanine. By analyzing the partial hydrolysis results and the amino acid composition of the nonapeptide, we can deduce the sequence. Considering the consistency with the partial fragments and Sanger's reagent labeling, the correct primary structure of the nonapeptide is gly-ala-phe-ser-ala-phe-asp-asp-ala. This takes into account the counts of each amino acid, the N-terminal label, and the partial hydrolysis results, putting the unique amino acid, glycine, at the N-terminus as indicated by the reaction with Sanger's reagent.

Answer:

The correct answer is that the storage of glucose is done in the form of glycogen that can be further dissociated to provide energy at the time an event or competition or any kind of physical work out.

Explanation:

The athletes or swimmers generally enrich their bodies by consuming enough foods rich in carbohydrates. The prime reason for getting loaded with carbs is that the carbs present in the form of glucose get accumulated in the body in the form of glycogen that can be further dissociated to provide energy to the body of the athlete at the time of performing any kind of physical work.  

The accumulated glycogen in the muscles works to provide energy for prolonged duration and thus helps in bettering stamina. Glycogen, which is a polysaccharide comprises energy that possesses the tendency to move towards the parts of the body that requires a quick burst of energy at the time of doing physical work like swimming.  

Final answer:

The energy from the sun and gravity drive the water cycle, which includes the processes of evaporation, condensation, precipitation, and runoff as water moves through various Earth systems.

Explanation:

The water cycle is driven by energy from the sun and gravity. The sun's energy warms the oceans and surface waters, leading to evaporation (water turning into water vapor) and sublimation (ice turning into water vapor). This water vapor then condenses into clouds and eventually precipitates as rain or snow, returning to the Earth's surface. Gravity plays a crucial role in pulling this precipitation back to the ground and also in driving the water through runoff, rivers, and streams back toward the oceans. Additionally, water can percolate into the ground, becoming groundwater, which also contributes to the movement of water in the cycle.

Answer:

-activation of glycogen phosphorylase

-activation of PKA (cAMP‑dependent protein kinase)

-conversion of ATP to cAMP

-activation of fructose 1,6‑bisphosphatase (FBPase‑1)

Explanation:

The binding of glucagon to its receptors affects the production of glucose in the liver. Once the glucagon receptors are activated, it leads to the activation of adenylate cyclase in which in turn increases the levels of cAMP (cyclic AMP) conversion from ATP. The increased level of cAMP then activates PKA (protein kinase A). PKA results in the phosphorylation of pyruvate kinase which results to the activation of fructose 1,6‑bisphosphatase (FBPase‑1) which results to decrease in glycolysis.

Furthermore, PKA  activates phosphorylase kinase which results to the activation of glycogen phosphorylase and hence glycogenolysis. Glycogenolysis occurs when Glucose-1- phosphate is then released from glycogen. PKA also inhibits the action of glycogen synthase.

Answer:

The information is not sufficient to support this asumption

Explanation:

To unequivocally determine the existence of selection acting on this trait (size), it is necessary to carry out an experiment in which the sample size should be statistically significant (N sample for each group > 50). Moreover, it is also important to include negative controls (i.e., individuals with an average size between both groups) in the experiment.

Answer:

Statements 1, 2 and 4 are correct:

"Hormones can be peptides, steroids, or amino acid derivatives."

"Hormones can stimulate the synthesis of target proteins through the activation of specific genes."  

"Hormones can increase the cellular uptake of metabolites."

Explanation:

Hormones are basically proteins that are released under particular conditions to bring about a certain response in the body. They can activate genes and even change how cells respond to metabolites, for instance, insulin and glucagon are two hormones that regulate the level of sugar in the blood. Another example is the hormone adrenaline, which is released in the 'flight-or-fight' response to prepare the body in taking action.

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Answer:

There is no short answer.

Explanation:

Athletes such as runners may prefer to train at higher altitudes than the altitude they perform at. This is because the higher altitude increases the number of red blood cells in the athletes body thus providing the muscles with more oxygen which increases performance.

If the runner moves from Nebraska to Colorado which is at a higher altitude, she will see an increase to her aerobic performance in the first three months.

I hope this answer helps.

Final answer:

Upon moving to a higher altitude in Colorado, the runner will likely experience hypoxia and an initial decrease in her aerobic performance. In response, her body will adapt by producing more red blood cells to increase oxygen transport, which may improve her endurance over time. She should expect acclimatization to take several weeks and should monitor for symptoms of high altitude sickness.

Explanation:

The 33-year-old female long-distance runner who has moved from Nebraska to Colorado will experience several physiological changes due to the increase in altitude, which can affect her aerobic performance. At higher altitudes, the air is thinner and contains fewer oxygen molecules per breath. This can lead to a condition known as hypoxia, where the body does not receive enough oxygen. Initially, her marathon times may worsen as her body acclimates to these conditions. However, over the first three months, her body will begin to adapt by producing more red blood cells, which carry oxygen to the muscles and other tissues. This adaptation is a common strategy for endurance athletes to improve performance, though it may take several weeks or more to see significant improvements in her running times. While she is likely to experience an initial drop in her performance due to the reduced oxygen availability, she may ultimately benefit from the altitude acclimation once the body adjusts.

During the acclimation period, she might also endure symptoms consistent with high altitude sickness such as increased heart rate, possibly nausea, and headaches. These symptoms should lessen as her body gets used to the higher elevation. Staying well-hydrated and giving herself time to adjust before engaging in intense physical activity can help mitigate these effects.

It's important to note that while training at high altitude can potentially improve her performance at lower altitudes, she should consult with a sports physician to optimize her training plans and ensure safe acclimatization. Close monitoring of her body's response during this period is crucial for her health and performance outcomes.

Answer:

Tall people are normally underweight

Answer: Option C.

Explanation:

Blackworms are organisms most effeciently used by scientists to study the effect of drugs on the circulatory system. They have a transparent skin which make it easier to observe pulse rate. Drugs easily diffused through the skin of blackworms which cause immediate effect and they are easy to maintain in the laboratory. When the blackworms are incubated with extra 2 minutes, their pulse rate will increased due to excessive absorption of the test solution.

Final answer:

If the blackworms were accidentally incubated for 4 minutes instead of the required 2 minutes, the pulse rate of the blackworms would be severely depressed or absent, possibly leading to the death of the worms.

Explanation:

If the blackworms were accidentally incubated for 4 minutes instead of the required 2 minutes in the test solution, it can affect the results. The correct option would be (d). The pulse rate of the blackworms would be severely depressed or absent due to the extended incubation time, possibly leading to the death of the worms. Incubation time is a crucial factor in experiments as it determines the amount of time for the reaction or process to occur.

Answer:

I don't know about the second sentence, is it possible you give me a bit more of a context then maybe i can be of help

Answer:

Change

Genetic

Time

Change Over time

Decent from a common ancestor

Explanation:

I got it correct.

Answer:

Polymerase chain reaction(PCR)

Explanation:

PCR is used to replicate the DNA into bigger amount until it is enough to be analyzed by different methods

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Answer:

Absorbing carbon dioxide

Forests help regulate the global climate by absorbing carbon dioxide and releasing oxygen through photosynthesis.

Forests help to regulate the global climate by absorbing carbon dioxide. They act as carbon sinks, taking in carbon dioxide from the atmosphere during photosynthesis and storing it in their biomass and soil. This helps to reduce the concentration of greenhouse gases, mitigating climate change.

In addition to absorbing carbon dioxide, forests also play a crucial role in releasing oxygen through the process of photosynthesis. They are often referred to as the 'lungs of the Earth' because they produce a significant amount of the oxygen we breathe.

While preventing soil erosion and emitting ozone are important functions of forests, they are not directly related to regulating the global climate.

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