7th evolution from Morales

• A

• B

• C

• D

• A

• B

• C

• D

• A

• B

• C

• D

• A

• B

• c

• D

• A

• B

• C

• D

• A

• B

• C

• D

.When paleontologists study fossils, which is true of the fossil record that they find?

•       The fossil record shows that organisms have changed very little over time

•     The fossil record is inconsistent with the scientific theory of evolution.

•       The fossil record is very limited and offers little knowledge about the history of life.

• A.      The fossil record shows how different groups of organisms have changed over time.

Scientists believe that the modern horse developed from a short, horse-like mammal about the size of a dog. Over millions of years, the horse increased in size and developed much longer legs. Horses with longer legs had a better chance of surviving than the shorter-legged members of the herd. How did longer legs help horses survive?

• A.      They allowed the horses to reach nuts in trees.

• A.      They allowed the horses to outrun predators. 

• A.      They allowed the horses to carry more body weight.

• A.      They allowed the horses to capture prey.

Which of the following causes gradual changes in a population to produce a new species and is often referred to as "survival of the fittest?"

• A.      natural selection 

• A.      symbiosis

• A.      isolation

• A.      adaptation

Most tortoises have large domed-shaped shells rather than flat shells. Which of the following best explains why?

• A.     Tortoises are amphibians, and domed shells are better for swimming.

• A.     There is little genetic variation in tortoises.

• A.     Having a flat shell is the result of injury.

• A.     Domed shells offer an advantage for survival.