Macroevolution 2

Question 1

What is the order of eras, oldest to newest?

Answer 1

Cambrian
Silurian
Devonian
Carboniferous
Triassic
Paleogene

Question 2

What happened in the Cambrian era?

Answer 2

Diversification of muticellular life

• increased oxygen which allows aerobic life
• enabled by end of snowball earth

Question 3

What happened in the Silurian era?

Answer 3

Plants developed from green algae

Leaves developed

Question 4

What happened in the Devonian period?

Answer 4

1st amphibian developed with fish and lungs

They lived on land and were the origin of vertebrates.

Also were Jawless with a defined head and tail and aquatic

Question 5

What happened in the Carboniferous period?

Answer 5

First animals
-insect like but much bigger

Reptiles went away from the sea and used lots of areas. They also had sealed amniotic eggs, scales, and made auric acid to conserve water.

Question 6

What happened during the Triassic period?

Answer 6

1st type of birds (archaeopteryx)

• wings
• beak
• long tail

Derived from tetrapods, bipedal dinosaurs that had feathers

Animals also developed hearing

Question 7

What happened during the paleogene period

Answer 7

Dinosaurs died

Question 8

How do genomes duplicate and make complex organisms?(simple)

Answer 8

Cell
Divides
Death
Differentiation
Complex organism

Question 9

What’s the punctuated equilibrium dynamic?

Answer 9

Evolution takes place in bursts of time (punctuations) that are “rapid” followed by periods of stasis

Question 10

What three things make punctuations?

Answer 10

Plate tectonics and evolution

Mass extinction and it’s causes

Biological innovations

Question 11

Plate tectonics and evolution (2)

Answer 11

Alters climate, amount of shallow seas and areas

Pulling apart over 250 million years

Question 12

Mass extinction and it’s causes (3)

Answer 12

Extinction of mega fauna (large bodied animals)
- have slow maturation and low reproduction

Death of sessile organisms

Causes: volcanic activity, large climate shifts or meteorites

Question 13

Biological innovations (4)

Answer 13

Flowering plants and insects together

Evolutionary novelty

• alteration in balance of forms
• animals change

Amphibia dominant until reptiles

Flying insects turned into birds

Question 14

How did limbs develop?

Answer 14

Through modification of transcription regulation.

Our arms are forelimbs and so are wings so we came from common ancestor