Lab 4 - Porifera and Cnidaria

Question 1

What organisms are in the phylum porifera?

Answer 1

sponges

Question 2

What level of organization are porifera?

Answer 2

cellular

Question 3

How many germ layers do porifera have?

Answer 3

none

Question 4

What kind of body cavity do porifera have?

Answer 4

Acoelom

Question 5

What type of symmetry do porifera have?

Answer 5

asymmetry

Question 6

How do porifera get food?

Answer 6

filter feeding - phagocytosis

Question 7

What kind of support system do porifera have?

Answer 7

no formal support system

Question 8

Porifera - locomotion

Answer 8

sessile

Question 9

What kind of circulation do porifera have?

Answer 9

none

Question 10

What kind of sensory structures do porifera have?

Answer 10

none

Question 11

How do porifera excrete?

Answer 11

diffusion

Question 12

How do porifera reproduce?

Answer 12

sexual and asexual

Question 13

What are the classes of porifera?

Answer 13

hexactinellida, demospongiae, and calcarea

Question 14

Osculum

Answer 14

large opening on top where water exits the sponge

Question 15

Ostia

Answer 15

pores where water enters the sponge

Question 16

Spongocoel

Answer 16

internal cavity of the sponge

Question 17

Choanocytes

Answer 17

flagellated cells that filter food from the water coming into the sponge

Question 18

Amoebocytes

Answer 18

interior of the sponge - aid in digestion, secretes spicules, and aids in reproduction

Question 19

Pinacytes

Answer 19

outer surface - maintain structure and size

Question 20

What are the three types of sponges?

Answer 20

Asconoid, sysonoid, and leuconid

Question 21

Asconoid

Answer 21

small and tube shaped

Question 22

Syconoid

Answer 22

tube-like with a complex canal system

Question 23

Leuconoid

Answer 23

largest and most complicated

Question 24

Are porifera monoecious or dioecious ?

Answer 24

monoecious

Question 25

What is the difference between monoecious and dioecious?

Answer 25

mono - one house (has both eggs and sperm) dio - two houses (has either eggs or sperm

Question 26

What organisms are in phylum cnidaria?

Answer 26

coral, jellyfish, and hydra

Question 27

What level of organization are cnidaria?

Answer 27

tissue

Question 28

How many germ layers do cnidaria have?

Answer 28

2 - diploblastic

Question 29

What kind of body cavity do cnidaria have?

Answer 29

Acoelom

Question 30

What kind of symmetry do cnidaria have?

Answer 30

radial

Question 31

Cnidaria - digestion

Answer 31

gastrovascular cavity

Question 32

What kind of support do cnidaria have?

Answer 32

hydrostatic skeleton

Question 33

Cnidaria - locomotion

Answer 33

simple muscle contraction

Question 34

What kind of circulation do cnidaria have?

Answer 34

none

Question 35

What kind of sensory structures do cnidaria have?

Answer 35

simple nerve net

Question 36

How do cnidaria excrete?

Answer 36

diffusion

Question 37

How do cnidaria reproduce?

Answer 37

sexual or asexual

Question 38

Where are cnidaria found?

Answer 38

aquatic

Question 39

What are the classes of cnidaria?

Answer 39

Hydrozoa, cubozoa, scyphozoa, staurozoa, anthozoa

Question 40

What are the two body forms of cnidaria?

Answer 40

polyp (anthozoa, hydrozoa) and medusa (scyphozoa)

Question 41

Hydrozoa

Answer 41

hydra, fire corals

Question 42

Are hydrozoa polyp or medusa dominant?

Answer 42

polyp

Question 43

Scyphozoa

Answer 43

true jellyfish

Question 44

Are syphozoa polyp or medusa dominant?

Answer 44

medusa

Question 45

Anthozoa

Answer 45

corals, anemones

Question 46

Are anthozoa polyp or medusa dominant?

Answer 46

they only have polyp stages

Question 47

Cnidaria - mesoglea

Answer 47

noncellular, gelatin layer

Question 48

Epidermis

Answer 48

outer germ layer with cnidocytes

Question 49

Gastrodermis

Answer 49

inner cell lining of the gastrovascular cavity

Question 50

How do cnidaria protect themselves?

Answer 50

with nematocysts within cnidocytes

Question 51

Nematocysts

Answer 51

specialized stinging cells

Question 52

cnidocytes

Answer 52

hold nematocysts

Question 53

Are cnidaria monoecious or dioecious?

Answer 53

both

Question 54

Where are the gonads formed in cnidaria?

Answer 54

gastrodermis

Question 55

Cnidaria -What is the hair-like trigger for the nematocysts?

Answer 55

cnidocil

Question 56

Planula

Answer 56

free swimming larvae

Question 57

How does a planula polyp become a medusa?

Answer 57

By strobilation

Question 58

How does water flow through porifera?

Answer 58

Through the ostia, out through the spongocoel, then out through the osculum