An athlete is taking part in vigorous exercise. Complete the two spaces in the passage.

The cells in her muscles respire anaerobically during vigorous exercise. This results in (A) debt and the production of (B) acid.

Answers need to be in this order (A), (B).

1. describe the structure and function of the specialized cells you observed in the video. 2. research the types of cells present in the kidney.

Pls ! in your opinion, what are the limiting factors that might affect the growth or diversity of our ecosystem? respond to this question in claim, evidence, reasoning format. 1. make your claim (i are the limiting factors that might affect the growth or diversity of our 2. follow the claim with 3 pieces of evidence. evidence may be taken from the reading, the videos, previous lessons, or googled answers. site sources, too. 3. use reasoning to explain why you chose your evidence.

Which of the following statements is true about the relationship between genetic variation and natural selection? a. genetic variation must be present in a population before natural selection can act on it. b. genetic variation arises in a population as a result of natural selection. c. natural selection can act on a population whether there is genetic variation within the population or not. d. after natural selection acts on a population, the amount of genetic variation in the population always increases.