Unit 6 Natural Selection/Evolution

Which of the following is the collection of life's remains found in sedimentary rock?

• natural selection

• homologous structures

• Charles Darwin

• the fossil record

The study of organisms at their earliest stage of life

• embryology

• the fossil record

• DNA

• vestigial structures

DNA and RNA are known as types of ________

• vestigial structures

• transitional fossils

• trace fossil

• genetic material

The picture shows a/an ___________

• homologous structure

• vestigial structure

The picture shows a/an ___________

• homologous structure

• vestigial structure

Which structure is shown in the picture?

• analogous structure

• homologous structure

• vestigial structure

• DNA

Humans breed dogs for certain traits. What is this practice called?

• variation

• adaptation

• natural selection

• artificial selection

Which of these descriptions is an example of an unused body structure?

• a bat’s wing that enables it to fly

• the tiny leg bones found in snakes that have no legs

• the front legs of a dog that supports its weight as it walks and runs

• the tentacles of an octopus that aid it in movement and catching prey

What is natural selection?

• When reproduction occurs and mutations happen.

• When a offspring has the traits from its parents.

• When an organism is able to camoflauge in its environment.

• the process whereby organisms that are better adapted to their environment tend to survive and reproduce more offspring.

In a cold environment what would be some adaptive traits? Sellect all that apply.

• thick blubber

• thick fur

• thin fur

• strong muscles