Animal Diversity Flashcards
1
Q
Animals are:
A
- Heterotrophic
- Eukaryotes
- Complex structures (tissues)
- Mostly diplontic
2
Q
What are invertebrates?
A
They are animals that lack a cranium and a defined vertebral column or spine
3
Q
What are vertebrates?
A
They do have a vertebral column or spine
4
Q
What do all animals have in common?
A
- They are eukaryotic and multicellular
- They typically reproduce sexually
- They lack a cell wall
- They are capable of motility in some stage of their life cycle
5
Q
What are some significant changes in their evolution?
A
- Moving from water to land
- Becoming less dependent on water
6
Q
What is the closest relative to animals?
A
Choanoflagellates
7
Q
Which group does not have a true tissue and is structurally simplistic?
A
Parazoa
8
Q
What is asymmetric symmetry?
A
No symmetry
9
Q
What is radial symmetry?
A
- arrangement of body parts around a central axis
- top and bottom
- no left, right, front or back
10
Q
What is bilateral symmetry?
A
- Divided through a midsagittal plane
- mirror image
- has a head/tail, front/back, right/left
11
Q
What is diploblastic?
A
2 germinal layers including the ectoderm and endoderm
12
Q
What is triploblastic?
A
3 germinal layers including the ectoderm, endoderm, and mesoderm
13
Q
A
