Evolutionary History

Which fossil is the youngest?

• Ammonite

• Trilobite

• Crinoid

• Fern

Answer explanation

The oldest rock layers are at the bottom. The youngest rock layers are at the top. This is the law of superposition. The fossils in each layer are the same age as the rock they are in.

Tags

NGSS.MS-ESS1-4

NGSS.MS-LS4-1

a body structure in two or more species that features the same parts

• shared structure

• speciation

• species

• ancestor population

Tags

NGSS.MS-LS4-2

a more recent species that evolved from an ancestor population

• common ancestor population

• paleontologist

• species

• descendant species

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NGSS.MS-LS4-2

NGSS.MS-LS4-4

an older population from which two or more newer species descended

• descendant species

• paleontologist

• common ancestor population

• shared structure

Tags

NGSS.MS-LS4-2

a scientist who studies fossils in order to understand the ancient history of life on Earth

• descendant species

• shared structure

• paleontologist

• speciation

Tags

NGSS.MS-LS4-1

NGSS.MS-LS4-2

Evolution is

• a group of organisms of the same kind (in one or more populations) that do not reproduce with organisms from any other group

• the process of turning into a human

• the process by which species adapt to environmental changes over a very long time

• the process by which one population evolves into two or more different species

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NGSS.MS-LS4-2

NGSS.MS-LS4-4

A descendant species is

• an older population from which two or more newer species descended

• everything (living and nonliving) that surrounds an organism

• a related organism from a previous generation

• a more recent species that evolved from an ancestor population

Tags

NGSS.MS-LS4-2

Which is the best description of evolution?

• When organisms change for no clear reason

• When organisms change into new organisms

• When organisms change over time to adapt to their environments

• When organisms don't change over time

Tags

NGSS.MS-LS4-1

NGSS.MS-LS4-2

NGSS.MS-LS4-4

A paleontologist is

• a scientist who studies weather

• a geologist

• a scientist who studies archaeology

• a scientist who studies fossils in order to understand the ancient history of life on Earth

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NGSS.MS-LS4-1

NGSS.MS-LS4-2

An adaptive trait is

• a trait that is a harmful mutation

• a trait that makes it more likely that an individual will survive in a specific environment

• a trait that always shows up randomly and makes an organism stronger

• an adoption

Tags

NGSS.MS-LS4-4