Metazoa Flashcards
1
Q
“Meta” means _____ and “Zoa” means ______
A
“Complex”, “Life Form”
2
Q
There are over ______ formally described species in Metazoa
A
2 million
3
Q
How many major phyla for animals
A
35
4
Q
Most Metazoa are
A
Arthropods
5
Q
Less than 5% of Animals are ____
A
Vertebrates
6
Q
Opisthokonts are…
A
Eukaryotes with a posterior flagella
7
Q
Closest single celled relative to Metazoa are
A
Choanoflagellates
8
Q
Choanoflagellates
A
Closest living relatives of animals
9
Q
Key Features of Metazoans
A
- are multicellular
- have cellular differentiation
- cell to cell communication
- heterotrophic
- motile
- maintain homeostasis
- diploid (meiosis at reproduction)
- have an embryonic stage
10
Q
Heterotrophic
A
Nutrients are derived from other organisms
11
Q
Choanocytes occur in
A
Sponges
12
Q
Simplest animal are
A
the Sponges
13
Q
Animal Phylogenetic Relationships are determined by 4 factors
A
- comparative morphology
- comparisons of embryology
- fossil record
- molecular sequence alignments
14
Q
Molecular comparison reveals similarities between
A
Choanoflagellates and Animals
