Biology Review Classification 2

The diagram at the right shows a partial classification scheme for monarch and viceroy butterflies. Based on this diagram, monarchs and viceroys belong to the same

• genus.

• family.

• species.

• subfamilies.

The dichotomous key shown below can be used to identify birds W, X, Y, and Z. Bird X is most likely

• Certhidea

• Geospiza

• Camarhynchus

• Platyspiza

According to this diagram, the DNA of which pair of organisms would show the greatest similarity?

• penguin and turtle

• horse and donkey

• snake and tuna

• turtle and rabbit

Explain why species B and C are more closely related than species A and C are.

• Because species B and C share a more recent common ancestor.

• Because species A and C have more differences in their DNA.

• Because species B and C live in similar environments.

• Because species A and C evolved at the same time.

The diagram indicates that a common ancestor for species C and E is species

• F

• G

• H

• K

Which species are least likely to be vital parts of a present-day ecosystem?

• A. A and E

• B. C and D

• C. E and J

• D. B and F

The evolutionary pathways of seven living species are shown in the diagram below. Which two species are likely to have the most similar DNA base sequences?

• A. B and G

• B. B and C

• C. E and G

• D. C and D

The diagram below illustrates a proposed evolutionary path of certain organisms, based on the theory of evolution. Which statement could best be inferred from the information in this diagram?

• A. Evolution does not involve gradual change.

• B. Evolutionary changes can result in extinction.

• C. Evolution begins with plants.

• D. Evolution produces organisms that all fill the same niche.

According to some scientists, patterns of evolution can be illustrated by the diagrams below. Which statement best explains the patterns seen in these diagrams?

• A. The organisms at the end of each branch can be found in the environment today.

• B. The organisms that are living today have all evolved at the same rate and have undergone the same kinds of changes.

• C. Evolution involves changes that give rise to a variety of organisms, some of which continue to change through time while others die out.

• D. These patterns cannot be used to illustrate the evolution of extinct organisms.

A current proposal in the field of classification divides life into three broad categories called domains. This idea is illustrated to the right. Which concept is best supported by this diagram?

• A. Evolutionary pathways proceed only in one set direction over a short period of time.

• B. All evolutionary pathways will eventually lead to present-day organisms.

• C. All evolutionary pathways are the same length and they all lead to present-day organisms.

• D. Evolutionary pathways can proceed in several directions with only some pathways leading to present-day organisms.