Phylum Cnidaria

Question 1

Poison-filled stinging structure

Answer 1

Nematocyst

Question 2

Cnidaria

Answer 2

Jellyfishes, sea anemones, and coral

Question 3

The layer found between the epidermis and gastroderm

Answer 3

Mesoglea

Question 4

Inner lining of gastrovascular cavity

Answer 4

Gastroderm

Question 5

Organisms that lack a backbone

Answer 5

Invertebrate

Question 6

Immobile

Answer 6

Sessile

Question 7

Mode of locomotion for Medusas

Answer 7

Jetpropulsion

Question 8

Hydras

Answer 8

Class hydrozoan

Question 9

Long flexible appendage

Answer 9

Tentacle

Question 10

Many connected individuals living and working together

Answer 10

Colony

Question 11

Jellyfishes

Answer 11

Class cyphozoa

Question 12

Colony of coral

Answer 12

Great Barrier Reef

Question 13

Colonial hydra

Answer 13

Portuguese man o’war

Question 14

Extracellular

Answer 14

Outside the cell

Question 15

Stinging cells

Answer 15

Cnidocytes

Question 16

Outer layer of cells

Answer 16

Epidermis

Question 17

Digestive chamber

Answer 17

Gastrovascular cavity

Question 18

Zygote formation in the open water

Answer 18

External fertilization

Question 19

Body plan with equal halves when bisected through the centre

Answer 19

Radial symmetry

Question 20

Circular and longitudinal muscles along with no water to facilitate movement

Answer 20

Hydrostatic skeleton

Question 21

Loose organization of nerve cells for stimuli detection

Answer 21

Nerve net

Question 22

Corals and sea anemones

Answer 22

Class anthozoa

Question 23

Statocyst

Answer 23

Cells for detecting gravity

Question 24

Ocelli

Answer 24

Eyespots

Question 25

Have 2 different looking life stages

Answer 25

1. Polyp | 2. Medusa