Question

test corrections change over time csa
13.2
which of the following is incorrect about the process of natural selection?
natural selection acts on existing variation within a population
natural selection cannot occur without the presence of competition for limited resources
natural selection occurs when organisms overproduce offspring in each generation.
natural selection causes organisms with helpful traits to die off before they are able to reproduce.

Explanation:

To determine the incorrect statement about natural selection, we analyze each option:

1. Natural selection acts on existing variation (traits) in a population—this is correct, as selection favors certain variations.
2. Competition for limited resources (e.g., food, space) is a key driver of natural selection, as organisms must compete to survive/reproduce—this is correct.
3. Organisms often overproduce offspring (more than can survive), leading to selection as only some survive—this is correct.
4. Natural selection favors organisms with helpful (adaptable) traits, allowing them to survive and reproduce. The statement "causes organisms with helpful traits to die off before reproduction" is the opposite of how natural selection works—this is incorrect.

Answer:

The incorrect statement is: "Natural selection causes organisms with helpful traits to die off before they are able to reproduce."