Ch 33: Invertebrates - Cnideria

Question 1

Cnidaria examples are:

Answer 1

Jelly fish and sea Anemones

Question 2

Cnidaria Symmetry is:

Answer 2

Radial

Question 3

Cnidaria is Diploblast meaning

Answer 3

having a body derived from only two embryonic cell layers (ectoderm and endoderm, but no mesoderm

Question 4

Cnidaria have what type of gut?

Answer 4

Incomplete meaning there is one opening for the mouth and anus

Question 5

mouth and anus are surrounded by what?

Answer 5

tenticles

Question 6

Cnideria come in what two forms?

Answer 6

pollup and medusa

Question 7

which of the two forms are free swimming?

Answer 7

medusa

Question 8

do cnideria have a brain?

Answer 8

no but they have a non-centralized nerve net to detect stimuli

Question 9

what are Cnidocytes?

Answer 9

specialized cells on tenticles and body surface

Question 10

what is a Nematocyst

Answer 10

structure with in the Cnidocytes that contain a small harpoon/stinger

Question 11

cnidaria reproduce asexualy through

Answer 11

budding

Question 12

Depending on the species, cnidarians can be monoecious meaning

.

Answer 12

(also called hermaphroditic), with individuals capable of producing both eggs and sperm,

Question 13

Depending on the species, cnidarians can be dioecious, meaning

Answer 13

individuals of separate sexes needed for gamete production

Question 14

Free swimming larva are called

Answer 14

Planula

Question 15

4 major clades of cnideria are:

Answer 15

Hydrozoans
Scyphozoans
Cubozoans
Anthozoans

Question 16

Clade Hydrozoans can

Answer 16

alturnate between polup and medusa

Question 17

Clade Scyphozoans are

Answer 17

umbrella shaped medusa stage is dominit (jellyfish)

Question 18

Clade Cubozoans are

Answer 18

box shaped medusa stage - highly toxic (box jelly)

Question 19

Clade Anthozoans are

Answer 19

sea aneomes / corals only have a polup stage