Unit 6 Evolution Concepts 2 and 3

Which pattern of evolution results in one species splitting into many over time?

• Coevolution

• Divergent evolution

• Convergent evolution

• Sexual selection

Organisms that live in similar environments, such as the ocean, often have similar adaptations. This is often due to

• convergent evolution.

• coevolution.

• gradualism.

• sexual selection.

Slow evolutionary changes over a long period of time.

Formation of a new species from a pre-existing species.

Burst of evolutionary change followed by periods of stability.

Multiple species evolving from a common ancestor.

When unrelated species evolve similar characteristics because they live in similar environments.

When two organisms evolve in response to the other.

Scientists can explore whether two different animal species have evolved from a common ancestor, using evidence from all of the sources below except

• analysis of strands of DNA.

• comparisons of bones and muscles.

• comparison of the experiences of each organism.

• studies of embryos during development.

Two bodily structures, found in different species, have different internal bone structures but serve a similar purpose in each organism. This is most likely describing .

• homologous structures

• vestigial structures

• analogous structures

• natural selection