Zoology unit 2

Question 1

etymology for protozoa

Answer 1

first animal

Question 2

etymology of porifera

Answer 2

pore bearing

Question 3

etymology of cnidaria

Answer 3

stinging nettle

Question 4

three germ layers

Answer 4

endoderm, ectoderm, mesoderm

Question 5

endoderm

Answer 5

digestive and respiratory tissues

Question 6

ectoderm

Answer 6

skin, brain, and spine

Question 7

mesoderm

Answer 7

skeleton, heart, reproductive organs

Question 8

what are the cnidarian germ layers

Answer 8

ectoderm and endoderm

Question 9

how do cnidarians obtain their food? What are the special structures?

Answer 9

they trap passing food with their tentacles: cnidocytes (cells), nematocyst (tentacle)

Question 10

what are examples of cnidarians?

Answer 10

jellyfish, coral

Question 11

how do poriferans obtain food?

Answer 11

filter feeding

Question 12

what are sponge buds called from asexual reproduction

Answer 12

gemmules

Question 13

two protozoa locomotion, and example

Answer 13

flagella: euglena
cilia: paramecium

Question 14

polyp vs medusa forms

Answer 14

polyps are tentacles up, medusa are tentacles down

Question 15

where are sponges usually found?

Answer 15

ocean

Question 16

what is the term for cnidarians that move between polyp and medusa phases

Answer 16

alteration of generations

Question 17

what group of cnidarians are capable of active hunting? which cause the most human deaths?

Answer 17

cubozoans (jellyfish)

Question 18

What do protozoa do in the environment?

Answer 18

feed organisms, release nutrients

Question 19

what do protozoa and metazoa have in common?

Answer 19

both motile and have animal characteristics. Protozoa are unicellular, metazoa are multicellular

Question 20

asconoid body plan

Answer 20

2 cell layers, water filtered through to osculum. generic

Question 21

synconoid body plan

Answer 21

inner canal filtering system. complex

Question 22

leuconoid body plan

Answer 22

inner canal system to digestive chamber. most complex. no real spongocoel

Question 23

cnidarians sensing organ

Answer 23

rhopalia

Question 24

relationship between coral polyps and algae

Answer 24

coral gives shelter, algae gives energy (PTS)

Question 25

symmetry of poriferans

Answer 25

asymmetry or radial symmetry

Question 26

symmetry of cnidaria

Answer 26

asymmetry, radial symmetry mostly

Question 27

are poriferans motile or sessile as adults?

Answer 27

sessilea

Question 28

are cnidarians motile or sessile as adults?

Answer 28

polyps are sessile, medusa are motile

Question 29

hydra coelenteron

Answer 29

basically body cavity

Question 30

hydra cnidocyte

Answer 30

stinging cells

Question 31

amoebocyte

Answer 31

curved tube thing

Question 32

choanocyte

Answer 32

collar cells

Question 33

epithelial cells sponge

Answer 33

spicules, pinaocytes

Question 34

porocyte

Answer 34

where food can enter osculum

Question 35

mesohyl

Answer 35

layer between endoderm and ectoderm