Ctenophora

Question 1

Ctenophores

Answer 1

• all marine

- mostly pelagic + predatory

Question 2

5 shared features btw ctenophores and cnidaria

Answer 2

1. radial symmetry
2. diploblastic
3. mouth, no anus
4. gastrovascular cavity w radiating canals
5. nerve net (not centralized)

Question 3

differences btw cnidaria and ctenophores

Answer 3

• asexual not well developed. mostly sexual
• majority are hermaphroditic - simultaneously.
• preculiar bi-radial cleavage of embryo. no planula larve.
• lack cnidocytes.

Question 4

distinctive features of ctenophores

Answer 4

adults = biradial symmetry
8 vertical comb row = cten
comb cilia - swim w cilia
2 long branched tentacles held in tentacle sheath
tentacles covered w colloblasts = sticky granules, stick to prey, reel in.

Question 5

cten = ?

collo =?

Answer 5

comb

glue

Question 6

body shapes ofctenophores

Answer 6

gooseberry
vase shaped
ribbon-like
dorso-ventrally flattened

Question 7

feeding

Answer 7

predators.
capture prey via colloblasts.
some eat vertebrates.
lack through-gt but recently found poopin