Bio Chapter 17/18 Evolution

According to Darwin's study on fossils, how did ancient organisms compare to modern species?

• The ancient organisms were identical to modern species.

• The ancient organisms were larger or smaller than modern species, but identical.

• The ancient organisms were much larger or smaller, with some similarities, to modern species.

Artificial selection has produced many crops, livestock, and pets. Which characteristic of artificial selection makes it different from natural selection?

• Humans, not the environment, select which organisms survive and reproduce.

• Adaptations develop gradually over many generations.

• The stock that are reproduced are genetically identical.

The adaptations of a pelican include its long, pouch-like beak. Why is its beak an example of adaptation?

• All birds have beaks, but the beaks vary among different species.

• The shape and structure of the beak has nothing to do with adaptations.

• The shape and structure of its beak help the pelican survive in its environment.

James Hutton and Lyell proposed that the features of the Earth's crust was formed by means of natural processes over geologic time. This is known as:

• natural selection.

• evolution.

• uniformitarianism.

The shape of the beaks of Galapagos finches are affected by _____.

• gender.

• rocks.

• availability of food.

Which of the following statements illustrates biogeography?

• A sequence of fossils shows that horses became smaller over time.

• Polar bears and grizzly bears are similar in many ways, but are adapted to live in different regions.

• Farm crops developed in Asia are now raised successfully in regions all over the world.

Body parts in different organisms that have the same basic structure, but may have different functions are called ___

• analagous structures

• homologous structures

• vestigal structures

Body parts in organisms that have the same functions, but have different structures are called ___

• analagous structures

• homologous structures

• vestigal structures

Body parts found in living organisms that no longer serve a purpose (not necessary for the organisms survival) are called ___.

• analagous structures

• homologous structures

• vestigal structures

Which is NOT an assumption of the Hardy-Weinberg Principle?

• No migration

• No natural selection

• Non random mating (mates are chosen based on how they look).