Midterm II

Question 1

What is phylum porifera?

Answer 1

sponges

Question 2

4 main sponge classes?

Answer 2

homosclermorpha, calcarea, hexactinellia. demosponge

Question 3

homosclermorpha?

Answer 3

small. uncommon, reduced

Question 4

calearea

Answer 4

sponge with calcareous spicules

Question 5

calearea

Answer 5

sponge with calcareous spicules

Question 6

hexactinellidae?

Answer 6

Venus flower basket, 6 rayed spicules

Question 7

demosponge

Answer 7

mot diverse, tend to be large, skeleton made of spicules

Question 8

take away message of sponges

Answer 8

most basal of animal groups
collection of unicellular protists
chemical arsenal

Question 9

Next evolutionary step?

Answer 9

Cnidarians, jelly fish, corals, anemones

Question 10

4 classes of cnidarians

Answer 10

hydrozoa, scyphozoa, cubozoa, anthozoa,

Question 11

Hydrozoa? Example?

Answer 11

Portuguese Man of War,

Question 12

Hydrozoa? Example?

Answer 12

Portuguese Man of War, no mesoglea, yes velume, gonads in the ectodermis

Question 13

Scyphozoa? Example

Answer 13

True Jelly Fish, cellular measoglea, no velume, gonads gastrodermis

Question 14

Cubozoa? Example

Answer 14

box jelly fish, mesoglea, velume, gastrodermis

Question 15

Anthozoa? Examples

Answer 15

Hexa or octo corals and anemones. Usually has symbiosis

Question 16

Anthozoa? Examples

Answer 16

Hexa or octo corals and anemones. Usually has symbiosis