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gayaneshka [121]
3 years ago
12

Without genetic variation, natural selection would not be possible. Explain why.

Biology
2 answers:
hoa [83]3 years ago
6 0
Because natural selection can only increase or decrease frequency of alleles that already exist in the population
Nina [5.8K]3 years ago
3 0

hello

Answer:

Explanation:

Without genetic variation, natural selection is only able to grow the number of allelomorphs that previously existed in the population. Natural selection can't select anything if there is no difference between individuals. Natural selection occurs through an interaction between the environment and the variability of the individual organisms making up a population. If every giraffe had the same neck length, there would be nothing to change and they would never have a long neck by now.

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GaryK [48]

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6 0
3 years ago
How does phosphorus reach surface waters​
egoroff_w [7]

It is an essential element for plant life, but when there is too much of it in water, it can speed up eutrophication (a reduction in dissolved oxygen in water bodies caused by an increase of mineral and organic nutrients) of rivers and lakes. Soil erosion is a major contributor of phosphorus to streams.
5 0
3 years ago
where the carbon atoms of acetyl coa end up and where the energy that was stored in acetyl coa ends up. krebs cycle
ruslelena [56]

Since each glucose molecule produces two acetyl-CoA molecules, the Krebs cycle must be completed twice to produce the four CO2, six NADH, two FADH2, and two ATPs.

  • Catabolic reactions occur within cells during cellular respiration. It is a biochemical process by which waste materials are removed and nutrients are broken down to generate energy, which is then stored in the form of ATP. The process of aerobic respiration needs oxygen.
  • The Krebs cycle, also known as the citric acid cycle, is the last step of oxidation for amino acids, lipids, and glucose.
  • Other than glucose, many animals rely on other substances for energy.
  • Protein's metabolic byproduct, amino acids, are deaminated and converted to pyruvate and other Krebs cycle intermediates.
  • They begin the cycle and are broken down, for example. On deamination, alanine turns into pyruvate, glutamate into -ketoglutarate, and aspartate into oxaloacetate.
  • Acetyl CoA is created when fatty acids are -oxidized and enters the Krebs cycle. It is the primary mechanism through which cells produce ATP. Complete nutrient oxidation results in the production of a significant amount of energy.

To know more about glucose check the below link:

brainly.com/question/13539511

#SPJ4

3 0
2 years ago
Which lists the steps of moitosis in the correct order?<br><br>PLZ ANSWER QUICK​
yarga [219]

Answer: Stages of mitosis: prophase, metaphase, anaphase, telophase.

Explanation: UR welcome

8 0
3 years ago
which of the following is a characteristic that could be applied to both living and non living things?
34kurt
They are both made up of organisms
5 0
4 years ago
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