Question

1. which body plan is the most complex in the phylum porifera?

a. asconoid
b. syconoid
c. leuconoid
d. meteoroid

1. which of the following is an incorrect match?

a. ectoderm—nervous system
b. mesoderm—skeletal system
c. endoderm—muscular system
d. endoderm—digestive system

1. as an animal develops, the ectoderm becomes the

a. heart.
b. tissue that lines the body cavity.
c. skin and nervous system.
d. muscle tissue.

1. many corals have a symbiotic relationship with this type of organism to gain nutrients:

a. clownfish
b. algae
c. anemones
d. bacteria

1. cnidarians are a step up in development from sponges because they possess which characteristic:

a. tissues
b. brain
c. self-defense
d. multiple body forms

1. which class of cnidarians are considered true jellyfish?

a. anthozoa
b. cubozoa
c. hydrozoa
d. scyphozoa

1. what type of reef is closest to the coast?

a. barrier reef
b. fringe reef
c. atoll reef
d. christmas reef

Explanation:

Answer:

1. c. Leuconoid
2. c. endoderm—muscular system
3. c. Skin and nervous system.
4. b. Algae
5. a. Tissues
6. d. Scyphozoa
7. b. Fringe reef