An example of an animal with paired nerve cords that connect to a simple brain is a ____

a. starfish
b. jellyfish
c. grasshopper


d. sea urchin
e. planarian


ANSWER: c

Biology & Microbiology

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RNA polymerase can do which one of the following?

A. allow RNA-DNA hybrids to form B. release a finished RNA transcript from a DNA template C. separate DNA strands D. restore the original DNA strands E. RNA polymerase is capable of all of these activities.

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Within a nucleoid, the supercoiled DNA loops are held together by:

A. proteins. B. topoisomerase II. C. homologous chromosomes. D. nucleosomes. E. nucleiods.

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The transfer of fluid from the glomerulus to Bowman's capsule _____

A) results from active transport B) transfers large molecules as easily as small ones C) is very selective as to which subprotein-sized molecules are transferred D) is mainly a consequence of blood pressure in the capillaries of the glomerulus

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The ________ have shells composed of calcium carbonate and thin pseudopods

A) Amebozoa B) Euglenids C) Ciliates D) Dinoflagellates E) Foraminifera

Biology & Microbiology