animal kingdom

Question 1

characteristics

Answer 1

1. eukaryotic, multicellular with no cell walls
2. heterotrophs that taken in food and digest it
3. move around
4. sexual reproduction

Question 2

classification

1 invertebrates or vertebrates

Answer 2

backbone or no backbone

Question 3

classification

2 levels of organization

Answer 3

tissue, organs, organ system

Question 4

classification

3 number of body layers

Answer 4

ectoderm: outermost layer
mesoderm: middle layer
endoderm: innermost layer

Question 5

classification

4 symmetry

Answer 5

radial symmetry: body plan can be divided along any plane through a central axis into roughly equal halves

bilateral symmetry: body plan can be divided along one plane through a central axis into equal halves

Question 6

classification

5 body cavity

Answer 6

coloemates: fluid filled body cavity

acoloemates: flattened bodies

Question 7

classification

6 segmentation

Answer 7

division of body into repetitive segments/sections

Question 8

classification

7 movement

Answer 8

all animals can move at some point in their lives but others become stationary or sessile as they get older
sessile: live attached to one place

Question 9

classification

reproduction

Answer 9

external fertilization: gametes combine outside the body

internal fertilization: gametes combine inside the body