Life Over Time

The pelvic bone of whales is not needed for movement within the water. This is an example of a(n) ______________ structure.

• vestigial

• analogous

• homologous

Tags

NGSS.MS-LS4-2

The forelimbs of mammals have similar anatomy because these groups descended from a recent common ancestor. Their bone structure is an example of a(n) ______________ structure.

• vestigial

• analogous

• homologous

Tags

NGSS.MS-LS4-2

What does Darwin's theory of evolution suggest?

• species change over time

• extinct species are not related to living species

• different species can interbreed

• animals that look alike are most closely related

Tags

NGSS.MS-LS4-1

NGSS.MS-LS4-2

NGSS.MS-LS4-4

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

• natural selection

• homologous structures

• Charles Darwin

• the fossil record

Tags

NGSS.MS-LS4-1

What is speciation?

• the ending or extinction of a single species

• the process of a single species changing gradually over time

• a single species has homologous structures with another species

• a process of some members of the species evolving into a separate species

Tags

NGSS.MS-LS4-2

NGSS.MS-LS4-4

a branched diagram that shows the relationships among organisms, including common ancestors

• Fossil Record

• Biological Evolution

• Cladogram

• Common Ancestor

Whales have pelvic bones. What type of structure does this best represent?

• Homologous structure

• Analogous structure

• Vestigial structure

• None of the above

Tags

NGSS.MS-LS4-2

Consider the evolutionary tree. Which is the best description of the two organisms highlighted in pink?

• They are separated by two nodes.

• They share a recent common ancestor.

• They belong to the same species.

• They are ancestors of each other.

Tags

NGSS.MS-LS4-2

NGSS.MS-LS4-3

In the phrase "survival of the fittest," the term "fittest" refers to:

• The best-adapted organisms

• The biggest organisms

• The smartest organisms

• The fastest organisms

Tags

NGSS.MS-LS4-4

Match the following terms with their definitions

• Any variation that makes an organism better able to survive

• Mutation

• a change in a species DNA over time because of natural selection

• Variation

• An inherited trait that makes and individual different

• Evolution

• A permanent change in the DNA

• Adaptation

Tags

NGSS.MS-LS3-1

NGSS.MS-LS4-1

NGSS.MS-LS4-2

NGSS.MS-LS4-4