Extinction and Biodiversity Flashcards
1
Q
What are mass extinctions?
A
Mass extinctions are five events in history; a sixth is underway due to human activity.
2
Q
What caused the Cretaceous extinction?
A
A meteor impact caused the extinction.
3
Q
What is the current biodiversity crisis?
A
Habitat destruction, overharvesting, and pollution are causing biodiversity loss.
4
Q
What are examples of aquatic biomes?
A
Freshwater: Lakes, rivers, wetlands (essential for life, low salt content). Marine: Oceans, coral reefs, estuaries (high salt content, critical ecosystems).
5
Q
What determines terrestrial biomes?
A
Temperature and rainfall.
