Zoology Test #1: Phylum Cnidaria

Question 1

Which class are cnidocytes only in the epidermis?

Answer 1

Hydrozoa

Question 2

Which class does gametes only produce in the epidermis and always released to the outside of the body

Answer 2

Hydrozoa

Question 3

Which class has a medusa with a velum?

Answer 3

Hydrozoa

Question 4

Which class is mostly marine with some freshwater species

Answer 4

Hydrozoa

Question 5

Which class has Hydras, Portuguese man-of-war, by-the-wind-sailor, Polyorchis, Gonionemus, and Obelia

Answer 5

Hydrozoa

Question 6

What does Hydrozoa mean?

Answer 6

Water serpent animal

Question 7

What does Scyphozoa mean?

Answer 7

Cup animal

Question 8

What class has small solitary polyps (scyphistoma)

Answer 8

Scyphozoa and Cubozoa

Question 9

What are small solitary polyps called?

Answer 9

scyphistoma

Question 10

What class has gametes gastrodermal in origin and release into the gastrovascular cavity

Answer 10

Scyphozoa and Anthozoa

Question 11

What class does the medusa lack a velum?

Answer 11

Scyphozoa

Question 12

What class is all marine?

Answer 12

Scyphozoa

Question 13

What class are all true jellyfish, moon jellyfish (Aurelia) in?

Answer 13

Scyphozoa

Question 14

What does Anthozoa mean?

Answer 14

flower animal

Question 15

What does Cubozoa mean?

Answer 15

cube animal

Question 16

What class is medusa cuboidal in shape with tentacles that hang from each corner of the bell

Answer 16

Cubozoa

Question 17

What class has a mesoglea with amoeboid cells?

Answer 17

Scyphozoa and Anthozoa

Question 18

Which class includes box jellyfish, sea wasp (Chironez flickeri)

Answer 18

Cubozoa

Question 19

What class is colonial or solitary polyps

Answer 19

Anthozoa

Question 20

What class has no medusa

Answer 20

Anthozoa

Question 21

What class has a gastrovascular cavity divided by mesenteries

Answer 21

Anthozoa

Question 22

Which class includes anemones and corals?

Answer 22

Anthozoa

Question 23

What does Staurozoa mean?

Answer 23

cross-shaped animal

Question 24

which class is medusa absent?

Answer 24

Staurozoa

Question 25

Which class has attachment to substrate with adhesive disk?

Answer 25

Staurozoa

Question 26

Which class is sexual reproduction only; non conciliated crawling planula?

Answer 26

Staurozoa

Question 27

Which class includes stalked jellyfish?

Answer 27

Staurozoa

Question 28

Name the symbiotic relationship between coral and zooxanthellae

Answer 28

Mutualistic

Question 29

3 layers of Cnidarian

Answer 29

Epidermis (outer), Mesoglea (middle), Gastrodermis (innermost layer)

Question 30

Two types of asexual reproduction of sea anemones?

Answer 30

1. Pedal laceration (pedal disk breaks away from polyp and grow into new pieces). 2. Longitudinal fission or transverse fission (sea anemones divide into two and missing parts are regenerated)

Question 31

Genus and species of box jellyfish?

Answer 31

Chironex fleckeri and Irukandji

Question 32

Function of cnidocil?

Answer 32

when stimulated, rapid influx (osmotic) of water causes nematocyst to evert and discharge.

Question 33

What is the asexual reproduction?

Answer 33

budding (in polyps)

Question 34

What is the sexual reproduction?

Answer 34

gametes in all medusa and some polyps, planula larva

Question 35

What is the skeleton?

Answer 35

Hydrostatic