Exam 12: Forces of Evolutionary Change

Artificial selection is responsible for many vegetable varieties.

Darwin obtained which of the following in the Essay on the Principle of Population by Malthus?

The mode of natural selection in which one extreme phenotype is fittest and the environment selects against the others is

The chance that a mutation will occur is independent of whether a new phenotype will benefit a population.

Antibiotic resistance is becoming more common in disease-causing bacteria because

Changes in heritable traits in a population through multiple generations is called

The few ancestors of the Galápagos finches who colonized the islands is an example of

Ancestors of giraffes with shorter necks could not reach branches high up in trees for food.This led to ________ for giraffes with longer necks.

Darwin referred to a gradual change from an ancestral type as

Ancestors of the Galápagos finches had two different types of seeds to eat on some islands.Some seeds were very small and required small beaks to handle.Other seeds were very large and required large strong beaks to crack.This led to ________ among the Galápagos finches.