Adaptive Radiations

Question 1

Adaptive Radiations

Answer 1

Evolution occurs on a continuum from gradual to rapid, cause fossil record to mostly show long periods of little change interrupted by explosions of new species

Question 2

Niches

Answer 2

Way organism uses its environment

Question 3

Heterochrony

Answer 3

Adaptive radiations are facilitated by polyploidy or rate of development

Question 4

Example of Heterochrony

Answer 4

Human and chimp brain sizes are different because skull growth is turned off at different times

Question 5

How many mass extinctions are there in fossil record?

Answer 5

Five

Question 6

Two most famous mass extinctions

Answer 6

Permian and Cretaceous

Question 7

Permian ME

Answer 7

250 mya, 90+% of species on land and sea lost, occurred during time of Pangea

Question 8

How long did it take life to recover after Permian?

Answer 8

5+ million years because of extreme temperatures, no life existed except for on the poles

Question 9

How hot was land after Permian?

Answer 9

120-140 degrees F

Question 10

How hot was water after Permian?

Answer 10

105 degrees F

Question 11

Cretaceous ME

Answer 11

65 mya about 3/4 of all species were lost (including the dinosaurs) because of chixilub

Question 12

Following Cretaceous ME

Answer 12

Mammals underwent a major adaptive radiation