Animal diversity

Question 1

bilateral symmetry

Answer 1

divisible into symmetrical halves

Question 2

cephalisation

Answer 2

the differentiation of the front end of an organism into a definite head

Question 3

deuterostome

Answer 3

developed an anus first

Question 4

endoderm

Answer 4

the inner most layer of the germ layers

Question 5

epiderm

Answer 5

thin layer of skin covering the dermis of plants or animals

Question 6

gastrulation

Answer 6

early phase in the embryonic development of most animals

Question 7

heterotroph

Answer 7

can not produce their own food, obtains nutrients by absorbing other organism

Question 8

mesoderm

Answer 8

middle germ layer

Question 9

protostome

Answer 9

mouth developed first

Question 10

radial symmetry

Answer 10

symmetrical no matter what way you turn it

Question 11

sagittal

Answer 11

vertical plane passing through the standing body from front to back

Question 12

sessile

Answer 12

organism that aren’t able to move

Question 13

anterior

Answer 13

part of body that is situated towards the front of another part

Question 14

basal

Answer 14

primitive or ancestral group

Question 15

detrivore

Answer 15

heterotrophs that obtain nutrients by consuming decomposing plant or animal parts

Question 16

dorsal

Answer 16

refers to the back part of an organism

Question 17

eumetazoan

Answer 17

subkingdom - all except sponges

Question 18

ecdysis

Answer 18

mouthing of the cuticle in many invertebrates

Question 19

indeterminate group

Answer 19

growth that is not terminated

Question 20

metazoan

Answer 20

all animals having the body composed of cells differentrated into tissues and organism

Question 21

ventral

Answer 21

refers to the front of an organism

Question 22

true gut vs gastrovascular cavity

Answer 22

gastrovascular cavity has one opening whereas true gut is more advanced

Question 23

diploblastic vs triploblastic

Answer 23

diploblastic - two layers, no mesoderm (sponges)

triploblastic - three layers

Question 24

parasitism

Answer 24

+/-

Question 25

mutualism

Answer 25

+/+

Question 26

competition

Answer 26

-/-

Question 27

prediation

Answer 27

+/-

Question 28

commensalism

Answer 28

+/0

Question 29

amensalism

Answer 29

-/0

Question 30

Porifera

Answer 30

sponges - no true tissue, no symmetry, interdetermdiate growth

Question 31

cnidaria

Answer 31

jellyfish, coral - true tissue, diploblastic, eumetazoan, gastovascular cavity

Question 32

Platyhelminthes

Answer 32

flat worms - bilateral, triploblastic, gastrovascular cavity, cephalisation

Question 33

nematoda

Answer 33

roundworms - bilateral, true gut, protostome, highly abundant, diverse lifestyle

Question 34

arthropod

Answer 34

insects (6 legs), millipedes etc - true gut, protostome, segmented body, hard exoskeleton

Question 35

annelida

Answer 35

earthworms, leeches - segmented, protostomes, no ecydis

Question 36

Mollusca

Answer 36

snails, shellfish, squid, octopus - soft, mobile unsegmented body

Question 37

echinodermata

Answer 37

sea urchins - bilateral symmetry, duetrosomes, no cephalisation, shredding exosym

Question 38

chordata

Answer 38

mammals, fish, reptiles - post anal tail, notochord, ventral heart, dorsal nerve cord