Evidence of evolution by natural selection

Question 1

Definition: Body parts that look similar in structure but have different jobs in different animals.

Example: A human arm and a bird wing (common ancestor).

Answer 1

Homologous (huh
·
maa
·
luh
·
guhs)

Question 2

Definition: Body parts that do the same job but are built differently and don’t share a

common ancestor.
Example: Bird wings and insect wings.

Answer 2

Analogous (uh
·
na
·
luh
·
guhs)

Question 3

Definition: Body parts that don’t have a use anymore but were useful to ancestors.

Example: Tiny leg bones in whales.

Answer 3

Vestigial (vuh
·
sti
·
jee
·
uhl)

Question 4

Definition: The study of how animals grow and develop from a fertilized egg to a baby.

Answer 4

Embryology (em
·
bree
·
aa
·
luh
·
jee
)

Question 5

Definition: A version of a gene that affects traits like eye color or hair type.

Answer 5

Allele (uh
·
leel
)

Question 6

Definition: Animals with a backbone or spine.

Examples: Fish, birds, mammals, reptiles, and amphibians.

Answer 6

Vertebrates (vur
·
tuh
·
bruhts)