Cnidarian

Question 1

Bioluminescence

Answer 1

The production of light by means of chemical reaction in an organism.

Question 2

Tentacle

Answer 2

A flexible appendage with stinging cells used to capture and paralyze prey

Question 3

Nerve net

Answer 3

A bundle of nerves, simplest form of nervous system found in multicellular animals

Question 4

Nematocyst

Answer 4

A stinging cell that is used to inject a toxin into prey

Question 5

Gastric cavity

Answer 5

Cavity (an empty space in an organism) where digestion of food takes place.

Question 6

Mesoglea

Answer 6

A gel substance that makes up the body of cnidarians

Question 7

Polyp

Answer 7

A body form for coral and sea anemone, sessile

Question 8

Medusa

Answer 8

The jellyfish body form

Question 9

Sexual reproduction

Answer 9

The fertilization of male and female gametes containing DNA to create a larva in cnidarians

Question 10

Asexual reproduction

Answer 10

Reproduction that does not involve the fertilization of gametes

Question 11

Planula

Answer 11

The free swimming larva, using cilia, of a cnidarian

Question 12

What happens in the Ephyra stage of the life cycle?

Answer 12

Ephyrae mature into medusas, which is the term for a fully grown jellyfish.

Question 13

What happens in the Strobilia stage of the life cycle?

Answer 13

In a process known as strobiliation, the strobila’s top segment peels off and drifts away, becoming a free-floating individual called an ephyra. This continues until all the segments are gone and only the original polyp remains.

Question 14

What happens in the polyp stage of the life cycle?

Answer 14

After maturing, the polyps undergo a radical change: they lose their tentacles and become non -feeding strobilae.