Evolutionary History

Question 1

Speciations

Answer 1

formation of new species

Question 2

Extinctions

Answer 2

-loss of species

Question 3

If Speciations > Extinctions, number of species _

Answer 3

Increases

Question 4

If Speciations < Extinctions, the number of species

Answer 4

Decreases

Question 5

Definition on Species

Answer 5

A species is a group of organisms that naturally interbreed and produce fertile offspring

Question 6

When Does Speciation Occur

Answer 6

Speciation occurs when 1 species splits into 2 or more distinct species (divergent evolution)

Question 7

Natural Causes of Extinction

Answer 7

• Changes in sea level or currents
• Asteroid/cosmic radiation
  *Disease/Epidemic

Question 8

Human Causes (HICOP) of Extincton

Answer 8

• Habitat loss
• Invasive species
• Climate Change
• Overharvest
• Pollution

Question 9

What does it mean for an animal to be a “generalist” vs. a “specialist” in terms of diet?

Answer 9

a generalist animal has a varied diet and can survive in a wide range of habitats, while a specialist animal has a limited diet and stricter habitat requirements

Question 10

Why were there so many fungal spores right after the asteroid impact?

Answer 10

they didnt need sunlight for food and just need lots of dead stuff