Cnidarians And Ctenophores

Question 1

Cnidarians are effective predators. (true or false).

Answer 1

True

Question 2

The nematocysts requires only small stimulus to fire and injecting prey with toxin. (true or false).

Answer 2

True

Question 3

What type of germ layer do cnidarians and Ctenophora have?

Answer 3

Diploblastic

Question 4

Weapons of cnidarians are called…….

Answer 4

Nematocysts

Question 5

In adult cnidarians the epidermis is developed from……..

Answer 5

The ectoderm

Question 6

In adult cnidarians the gastrodermis is developed from……..

Answer 6

The endoderm

Question 7

Currently neither sponges or placozoans are considered as…….

Answer 7

Diploblastic

Question 8

Over 9000 species are in the phylum Cnidaria. (true or false).

Answer 8

True

Question 9

A specialized cells in cnidarians……

Answer 9

Cnidocytes

Question 10

Cnidocytes contain specialized organelles called……

Answer 10

Cnidae

Question 11

The most common type of cbidae is……..

Answer 11

Nematocysts

Question 12

Nematocysts are only produced and used by cnidarians, but other animal such as (mulascas, Ctenophora and flat worms) eat cnidarians and can incorporate nematocysts to their use and needs. (true or false).

Answer 12

True

Question 13

Most cnidarians are………

Answer 13

Marine environments

Question 14

Some cnidarians are………..

Answer 14

Fresh water

Question 15

Non of the cnidarians are………..

Answer 15

Terrestrial

Question 16

There is a…….. Symbiotic relationship between algae and coral reefs

Answer 16

Mutualistic

Question 17

The four classes of cnidaria are…….

Answer 17

Syphozoa - cubozoa - hydrozoa - anthozoa

Question 18

A fifth class is

Answer 18

Staurozoa

Question 19

A sixth class of cnidaria has been proposed and molecular data now identifies, and its highly modified parasitic forms is……..

Answer 19

Myxozoa

Question 20

Dimorophism and polymorphism in cnidarians, all are one of two morphological types, and they exhibit dimorophism. (true or false).

Answer 20

True

Question 21

……….. Is adapted to a sedentary life

Answer 21

The polyp (hydroid)

Question 22

Is adapted to a motile life

Answer 22

Medusa (jellyfish)

Question 23

Most polyps have……

Answer 23

Tubular body

Question 24

In most polyps the mouth leads to…

Answer 24

into a blind gastrovascular cavity

Question 25

In most polyps the mouth leads to…

Answer 25

into a blind gastrovascular cavity