25.3 multicellulars Flashcards
1
Q
when did they evolve
A
1.5 bya
2
Q
what are ediacaran biota
A
soft bodied organisms from 565 t o535 mya
3
Q
why were multicellulars small until 565 mya
A
ice ages confined earth to around deep sea vents and hot springs or equatorial parts of earth with no snow
4
Q
what happened 535-525 mya
A
cambrian explosion
- lots of new species with bones and predators
5
Q
precambrian vs cambrian
A
-herbivores to carnivores
-filterfeeders to predators
-safe and sow moving to sharp spines and body armor
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