Evolution and Natural Selection

What is evolution?

• Organisms changing what they look like

• A change in the gene pool over time

• New organisms being created through cross-breeding

• A change in the gene pool instantly

Tags

NGSS.MS-LS4-2

NGSS.MS-LS4-4

Variation of genes in a small population

• Evolution

• Peppered Moths

• Genetic Drift

• Gene pool

Tags

NGSS.MS-LS4-4

Mutations can be good or bad

• True

• False

Tags

NGSS.MS-LS3-1

Moving genes to new populations

• Gene Flow

• Mutations

• Evolution

• Anatomy

Tags

NGSS.MS-LS4-4

Changes genes in the gene pool

• Evolution

• Classification Systems

• Fossil

• Natural Selection

Tags

NGSS.MS-LS3-1

NGSS.MS-LS4-4

What is a fossil?

• A rock with crystal deposits inside

• An impression of an organism that is left in rock

• Ancient fish bones

• Organisms trapped in amber

Tags

NGSS.MS-LS4-1

How do fossils help us understand evolution?

Tags

NGSS.MS-LS4-1

NGSS.MS-LS4-2

Homozygous Structures are:

• Similar structures that related species have inherited

• Structures that look and work similarly because organisms live in a similar environment

• Structures in an organism that no longer have a purpose

• Different structures that different organisms have

Tags

NGSS.MS-LS4-2

Analogous Structures are:

• Similar structures that related species have inherited

• Structures that look and work similarly because organisms live in a similar environment

• Structures in an organism that no longer have a purpose

• Different structures that different organisms have

Tags

NGSS.MS-LS4-2

Vestigial structures are:

• Similar structures that related species have inherited

• Structures that look and work similarly because organisms live in a similar environment

• Structures in an organism that no longer have a purpose

• Different structures in different organisms

Tags

NGSS.MS-LS4-2