Chapter 18 Flashcards
0
Q
List a hypothesis for the origin of animals
A
A colonial flagellated protist may have evolves into a simple animal with specialized cells arranged in two layers
1
Q
What major characteristics define an animal?
A
Multicellular
Heterotrophic eukaryotes that obtain nutrients by ingestion
2
Q
Pseudocoelome
A
Body cavity not completely lines by tissue derived from a type of tissue called mesoderm
