Animal evolution chapter 32 Flashcards
1
Q
First Animals
A
560 mya/First forms are known as the Ediacaran fauna/Filter feeders resembling corals, worms, and jellyfish.
2
Q
Cambrian Explosion
A
Adaptive radiation of organisms/Many current phyla are represented during this period/Some have been lost
Cambrian Explosion
3
Q
Causes of the Cambrian Explosion
A
Three hypotheses:
Coevolution of predator-prey relationships/More oxygen in the atmosphere/Evolution of the Hox gene led to more diversity
4
Q
Prokaryote or eukaryote?
A
Eukaryotes
5
Q
Unicellular or multicellular?
A
Multicellular
6
Q
Cells lack what unique structures?
A
No cell wall, no chloroplasts
7
Q
What mode of nutrition?
A
Heterotrophic
8
Q
Tissues develop from germ layers
A
except Porifera
