Which of the following is true about natural selection? Choose 1

It can only act on traits that are heritable and show variation.

Explanation:

For natural selection to act on a trait, there must already be variation for that trait. In addition, the trait must be heritable, or able to be passed from parent to offspring.

answer: accepted answer: aquatic animals use the oxygen dissolved in water to carry out respiration. since the amount of dissolved oxygen in water is low as compared to the amount of oxygen in the air, therefore the rate of breathing in aquatic animals is much faster than it is in terrestrial animals.

explanation:

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answer: collecting information/data

reason: the student is going around and asking people questions to collect data

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