Phylum Cnidaria

Question 1

The Phylum Cnidaria exhibit __________ or __________ symmetry. What are these?

Answer 1

primary radial or biradial

Question 2

The Phylum Cnidaria exhibit __________, in which body parts are arranged concentrically around an oral-aboral axis. What is this?

Answer 2

Radial symmetry

Question 3

The Phylum Cnidaria exhibit __________ is basically a type of radial symmetry in which only two planes through the oral-aboral axis divide the animal into mirror images because the body contains a paired structure. What is this?

Answer 3

Biradial symmetry

Question 4

In Phylum Cnidaria, all other ________ have a primary bilateral symmetry; they are bilateral or were derived from an ancestor that was bilateral. What is this?

Answer 4

eumetazoans

Question 5

The Phylum Cnidaria came from the greek word knidē, which means? + L. aria [pl. suffix]; ________)

Answer 5

nettle
like or connected with

Question 6

The Phylum Cnidaria is a group of more than __________ species.

Answer 6

9000

Question 7

The Phylum Cnidaria takes its name from cells called _________. What is this?

Answer 7

cnidocytes

Question 8

It contain the stinging organelles (cnidae) characteristic of the phylum. What is this?

Answer 8

cnidocytes

Question 9

stinging organelles

Answer 9

(cnidae)

Question 10

Cnidae come in several types, including the common ___________.

Answer 10

nematocysts

Question 11

These are formed only by cnidarians. What are these?

Answer 11

Nematocysts

Question 12

Cnidarians are an ancient group with the ___________ of any animal phylum, reaching back more than 700 million years.

Answer 12

longest fossil history

Question 13

The Phylum Cnidaria are widespread in _________ habitats, and some occupy ___________.

Answer 13

marine
fresh water

Question 14

The Phylum Cnidaria are mostly ______ or fairly slow moving or slow swimming.

Answer 14

sessile

Question 15

What are the examples of Phylum Cnidaria? There are seven.

Answer 15

1. branching
2. plantlike hydroids
3. flowerlike sea anemones
4. jellyfishes; and those
5. architects of the ocean floor
6. gorgonian corals (sea whips, sea fans, and others)
7. stony corals, whose thousands of years of calcareous house building have produced great reefs and coral islands.

Question 16

What are the examples of Phylum Cnidaria? There are three.

Answer 16

1. Marine Hydroids
2. Flower-like sea anemones
3. Jellyfishes

Question 17

What are the examples of Phylum Cnidaria? There are three.