DNA varies from species to species in
a. how much adenine binds with thymine
rather than with cytosine.
b. whether DNA is a double or a single helix.
c. the variation in the backbone structure.
d. how many different bases it contains.
e. its sequence of DNA base-pairs
E
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The plant hormone that promotes cell division
is
a. auxin. b. gibberellin. c. cytokinin. d. abscisic acid. e. ethylene
Which of the organisms below give support for the colonial theory of animal origins?
a. Spriggina b. choanoflagellates c. Ediacarans d. trilobites e. club fungi
Which are nursery grounds for shrimp and
many invertebrates and fish? a. photic zones b. benthic zones c. estuaries d. pelagic zones e. limnetic areas
Which of the following is not a function of muscle?
A) generate heat B) destabilize joints C) move lymph in lymphatic vessels D) move blood in veins