Sea stars belong to the 

A. Asteroidea.
B. Holothuroidea.
C. Echinoidea.
D. Crinoidea.


A. Asteroidea.

Biology & Microbiology

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Which organisms will not use master genes?

a. Bacteria b. Earthworms c. Fruit flies d. Mice e. Rats

Biology & Microbiology

The start signal in an mRNA strand is

a. UAG. b. GUA. c. AUG. d. TAG. e. ATG.

Biology & Microbiology

The antibody _______ measures the amount of antibody present in a sample of plasma.

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology

With regard to the cohesion-tension mechanism, "cohesion" refers to the

A) evaporation of water from the stomata of the leaf. B) attraction of water molecules for one another. C) use of water in photosynthesis, resulting in a shortage of water in the leaf. D) process of osmosis that pulls water into the root. E) tendency of water molecules to be attracted to minerals in the water.

Biology & Microbiology