Porifera, Cnidaria, Ctenophora

Question 1

What spicules does the Porifera class Calcera have?

Answer 1

Calcium carbonate spicules

Question 2

Porifera Calcera can be any of the three body system types, True or False?

Answer 2

True, they can be asconoid, syconoid, or leuconoid

Question 3

Most Porifera Calcera are what shapes?

Answer 3

they are small and Vase-shaped or tubular.

Question 4

What spicules does the Porifera class, Hexactinellida have?

Answer 4

Silica spicules

Question 5

What is left behind when Porifera Hexactinellida’s living cells die?

Answer 5

Glass-like lattice

Question 6

What body system types can Hexactinellida exhibit?

Answer 6

Can be leuconoid or syconoid.

Question 7

What spicules can the Porifera class Demospongiae have? (long answer)

Answer 7

Silica, sponging spicules, or both!

Question 8

What body system do all Demospongiae exhibit?

Answer 8

All are leuconoid!

Question 9

SIZE OF DEMOSPONGIAE??

Answer 9

Many are Large!

Question 10

Demospongiae bonus facts!

Answer 10

Soft sponging like bath sponges. Have freshwater varieties, the largest of the Porifera class.

Question 11

Sessile means?

Answer 11

fixed in one place, immobile

Question 12

What do filter feeders do?

Answer 12

Strain food particles from the water

Question 13

The cellular level of organization in Porifera?

Answer 13

specialized cells, no true tissues or organs. (single germ layer)

Question 14

What is the inner meshwork of Porifera made of?

Answer 14

microscopic spicules or collagen fibers or BOTH!

Question 15

What does the inner meshwork function as?

Answer 15

functions as an internal skeleton

Question 16

How many cell types does Porifera have and how are they arranged?

Answer 16

4, arranged around a system of canals and pores.

Question 17

Define Mesohyl

Answer 17

gelatinous mix in which sponge cells are embedded.

Question 18

Describe leuconoid body system:

Answer 18

Largest system, most complex, small chambers lined with choanocytes.

Question 19

Describe syconoid body system:

Answer 19

Bigger than asconoids, tubular single osculum, tube shaped, Lining is folded
outward canals lined
with choanocytes

Question 20

Describe asconoid body system:

Answer 20

Tube-shaped, don’t get big (smallest of the 3), one internal cavity lined with choanocytes.

Question 21

What is the cellular organization of the Phylum Cnidaria?

Answer 21

Tissue level: specialized cells, tissues, lacking organs. (2 germ layer)

Question 22

What are Cnidocytes?

Answer 22

specialized stinging cells.

Question 23

How many life phases do Cnidarians have and what are they called?

Answer 23

2 distinct phases; medusa and polyp.

Question 24

What is a Hydrostatic skeleton and do Cnidarians have it?

Answer 24

flexible skeleton supported by fluid pressure, yes Cnidarians have it.

Question 25

Polyp form

Answer 25

anchored down, mouth up

Question 26

Medusa form

Answer 26

Free-floating, mouth down

Question 27

Name characteristics of Hydrozoa (1 of 4)

Answer 27

polyp form dominant

Question 28

Characterisitics of hydrozoa (2 of 4)

Answer 28

In medusa form. bell projects inward to form a velum'

Question 29

Charact. of Hydrozoa (3 of 4)

Answer 29

most are colonial and have distinct polyp & medua phases.

Question 30

Charact. of Hydrozoa (4 of 4)

Answer 30

Have specialized polyps for prey capture, feeding, and reproduction.

Question 31

Class Scyphozoa characteristic (1 of 4)

Answer 31

Medusa form is dominant

Question 32

Class Scyphozoa charact. (2 of 4 )

Answer 32

No velum present on bell of medusa

Question 33

Scyphozoa charact. (3 of 4)

Answer 33

Margin of bell is scalloped

Question 34

Scyphozoa charact. (4 of 4)

Answer 34

Four gastric pouches connected to radial canals and a ring canal (think like flowers off of spongebob)

Question 35

Class Cubozoa characterisitcs (1 of 4)

Answer 35

Medusa form is dominant

Question 36

Cubozoa characteristics (2 of 4 )

Answer 36

Bell is a square in cross-section (thats why its box jellyfish)

Question 37

Cubozoa cubozoa cubozoa characteristics (3 of 4)

Answer 37

Has a velarium, NOT a velum.

Question 38

Cubozoa characteristic (4 of 4)

Answer 38

Flattened pedalium on each tentacle.

Question 39

Class Anthozoa characteristics (all 3 of them)

Answer 39

Flower-like appearance, Polyp form is dominant, and has NO MEDUSA STAGE.

Question 40

What phase do Ctenophora exhibit?

Answer 40

Medusa phase only

Question 41

cool light related thing about ctenophora?

Answer 41

they are iridescent and luminescent

Question 42

How many rows of plates do Ctenophora have

Answer 42

8

Question 43

What are on the plates of Ctenophora and what are they used for?

Answer 43

Cilia! for locomotion!

Question 44

Do they have nematocytes?

Answer 44

NO! but they can incorporate them from Cnidarian prey for their own self defense! thats super cool!

Question 45

Ctenophora have statocytes, what are statocytes used for?

Answer 45

balance