Bio 1 - evolutionary history

Question 1

5 major extinction events

Answer 1

Dinosaur extinction was the last one. Know two:

1. 65 MYA Cretaceous-Tertiary boundary (C-T)
2. 250 MYA Permian extinction - largest loss of life (~95%)

Question 2

Connections between continents has an effect of the animals on each

Answer 2

1. between N. America and asia

2. between N. and S. America

Question 3

Formation of the Himalayan mountains

Answer 3

Himalayan mountains the result of India crashing into Asian plate

Question 4

Trilobytes

Answer 4

Wiped out in Permian extinction

Question 5

Pterosaurs

Answer 5

Debate whether the big ones could fly or not

Question 6

Ammonites

Answer 6

Wiped out at 65 MYA extinction

Question 7

Types of Dinosaurs

Answer 7

1. “Saurischians”: From lizard-like hips

2. “Orinthischians”: From bird-like hips

Question 8

Evidence supporting metor theory (65 MYA)

Answer 8

1. Iridium around the world
2. Meter 6km across found - Chiexulab crater
3. Tsunami evidence in Texas
4. Evidence of soot at 65 MYA
5. Shocked quartz

Question 9

Differences between apes and humans

Answer 9

1. 4 curves of spine vs. 2
2. Foramen magnum is at the base of skull rather than back of skull
3. Apes dental features include Diastema (space by the canines)

Question 10

Archaeological finds

Answer 10

1. Mostly in east Africa (“Rift” is exposing layers of rock)

Question 11

Don Johanson

Answer 11

Found “Lucy” skeleton, dated 3 MYA. A. Aftarensis

Question 12

Mary Leakey

Answer 12

Footprints of human and child in ash (3 MYA)

Question 13

Evolution of humans

Answer 13

Was branchy. Some species existed at the same time (neanderthals in Europe).