AP BIOLOGY

EVOLUTION

DARWIN’S THEORY OF NATURAL SELECTION

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Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]

Darwin believed that it was not easy to survive in nature. There was always a risk of running out of food, water, space or getting eaten by a predator. What are these dangers called?

A	variations
B	natural selections
C	environmental pressures
D	species

Explanation:

Detailed explanation-1: -More individuals are produced each generation that can survive. Phenotypic variation exists among individuals and the variation is heritable. Those individuals with heritable traits better suited to the environment will survive.

Detailed explanation-2: -The five theories were: (1) evolution as such, (2) common descent, (3) gradualism, (4) multiplication of species, and (5) natural selection.

Detailed explanation-3: -Individuals with adaptive traits-traits that give them some advantage-are more likely to survive and reproduce. These individuals then pass the adaptive traits on to their offspring. Over time, these advantageous traits become more common in the population.

Detailed explanation-4: -Natural selection is an inevitable outcome of three principles: most characteristics are inherited, more offspring are produced than are able to survive, and offspring with more favorable characteristics will survive and have more offspring than those individuals with less favorable traits.

There is 1 question to complete.