Evidence for Evolution

How is the modern horse anatomically different than its ancestors?

• The modern horse has a taller/bigger molar

• The modern horse is smaller

• The modern horse has a shorter molar

• The modern horse has less hair

The similarities in the human arm and the bat wing indicate that they...

• may share a common ancestor

• are competitive with each other

• eat the same food

• are both birds

Which statement best represents the illustration?

• All of the above are mammals

• All of the above share homologous structures

• All of the above structures show no evidence of relationship

• All of the above animals evolved in the same habitat

Distributions of lizard species are shown on this map. Lanzarote island is the oldest and El Hierro is the youngest. Where did the common ancestor for the lizards probably come from?

• El Hierro

• La Palma

• Gran Canaria

• Lanzarote

Which regions would likely have similar organisms, providing evidence for common ancestry?

• Nearctic and Ethiopian

• Palaearctic and Neotropical

• Nearctic and Southarctic

• Palaearctic and Oriental

Based on the table, the closest evolutionary relationship most likely exists between the...

• Human and Gorilla

• Human and Chimpanzee

• Chimpanzee and Gorilla

• Horse and Zebra

Based on the table, which 2 species are LEAST closely related?

• Species 1 & 2

• Species 2 & 3

• Species 3 & 4

• Species 1 & 3

A study of the embryos of a red squirrel, an owl and a beaver showed that the beaver and the red squirrel appear to be the MOST closely related. This conclusion would be reasonable if the scientist observed that...

• the beaver embryo looked most similar to the owl embryo

• the owl embryo looked most similar to the red squirrel embryo

• the beaver, red squirrel, and owl embryos all looked the same

• the red squirrel embryo looked most similar to the beaver embryo

The diagram represents embryonic development in 5 organisms. The similarities in embryonic development shown in the diagrams suggest...

• all undergo external development

• may have evolved from a common ancestor

• are all members of the same species

• have adaptations for the same environment as adults

A biologist discovers two new species of birds, one in North America and one in Northern Canada. While slightly different, they resemble each other closely. Which type of evidence would be most useful in determining whether or not these organisms are closely related?

• The geologic history of the two areas revealed in the fossil record

• Analysis of the ecosystems in which the two species live

• Analysis of the breeding and embryo development of the two species

• A comparison of the DNA from the two species