A true coelom a. has mesoderm-derived tissues extending from the dorsal and vent

Question

A true coelom

a. has mesoderm-derived tissues extending from the dorsal and ventral sides that support
internal organs.
b. allows organs to grow and move independently of the outer body wall.
c. is a fluid-filled cavity completely lined by mesoderm.
d. may be used as a skeleton by soft-bodied coelomates.
e. all of the above.


Animals in which of the following phyla have a hollow dorsal nerve cord, pharyngeal slits, a notochord, and a post-anal tail?

a. Porifera
b. Arthropoda
c. Annelida
d. Mollusca
e. Chordata


The importance of the amniotic egg is that it freed animals of the need to ________ .

a. eat.
b. reproduce in water.
c. respire.
d. produce ATP.
e. eliminate ammonia.


What is the name of the mass of cells inside of the human blastocyst that differentiates into the fetus?

a. fetal mass
b. embryonic mass
c. the inside scoop
d. inner world
e. inner cell mass


That mass of cells is

a. totipotent
b. pluripotent
c. multipotent

Explanation / Answer

1: E 2:E 3:B 4:E 5: A

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