SB5 Students will evaluate the role of natural selection in the development of the theory of evolution. b. Explain the history of life in terms of biodiversity, ancestry, and the rates of evolution.

Lesson Focus: Evidence for EvolutionGeorgia Performance Standards for Biology

In your notebook, write down the similarities between the two sisters on the left and the two Elvis impersonators on the right.

WARMUP FOR WEDNESDAY, NOVEMBER 5

Do they look alike for the same reasons?

Sisters Elvis impersonators

Do they look alike for the same reasons?

Similarities are inherited

Sisters Elvis impersonators

Similarities are due to other

reasons

Lesson Focus: Evidence for Evolution

Similarities are important in biology.Some traits

shared by two living things are inherited

from an ancestor.

Sisters Elvis impersonators

Some similarities

evolved in other ways.

Lesson Focus: Evidence for Evolution

Similarities are important in biology.Some traits

shared by two living things are inherited

from an ancestor.

Sisters Elvis impersonators

Some similarities

evolved in other ways.

Lesson Focus: Evidence for Evolution

Similarities are important in biology.Some traits

shared by two living things are inherited

from an ancestor.

Some similarities

evolved in other ways.

dog paw

humanhand

butterfly wingbird

wing

Lesson Focus: Evidence for Evolution

Similarities are important in biology.Some traits

shared by two living things are inherited

from an ancestor.

Some similarities

evolved in other ways.

dog paw

humanhand

butterfly wingbird

wing

HOMOLOGOUS ANALOGOUS

Lesson Focus: Evidence for Evolution

Similarities are important in biology.

VESTIGIAL

Lesson Focus: Evidence for Evolution

Some traits may become reduced

or lose their function.

Example: Python limb buds

Comparative Anatomy: Scientists compare the anatomy of different organisms to figure out how

closely they are related.

Lesson Focus: Evidence for Evolution

Frayer Models for Comparative Anatomy Terms

Homologous • Vestigial • Analogous

Lesson Focus: Evidence for Evolution

Definition

Example

Word

Support for Evolution?

Non-Example

Comparative Anatomy Terms

Lesson Focus: Evidence for Evolution

• Homologous – anatomically similar structures inherited from a common ancestor

• Vestigial – structures inherited from a common ancestor which become reduced in size or lose their function over the course of evolution

• Analogous – structures with similar functions but different constructions; NOT inherited from a common ancestor