Lecture 3

Question 1

Giraffes and why they have long necks

Answer 1

-long necks have evolved from male giraffes who are able to win more fights than the short necked giraffes

Question 2

Evidence for Evolution: Fossils

Answer 2

differences between species that were around today and a long time ago

Question 3

Evidence for Evolution: DNA from extinct organisms

Answer 3

genetic differences from extinct species to modern species that are still around

Question 4

Evidence for Evolution: Transitional forms

Answer 4

many transitional forms have been discovered with traits that are intermediate between earlier and later species
ex. brain size in humans

Question 5

Evidence for Evolution: vestigial traits

Answer 5

a characteristic that is from an ancestor but has changed from the ancestral use, becoming smaller or less prominent

Question 6

Evidence for Evolution: Speciation

Answer 6

artificial selection

Question 7

Evidence for Evolution:

Geographic Continuity

Answer 7

difference in geographical habitats