The atrioventricular valve(s) is/are located ____
a. between the left atrium and the left ventricle only
b. between the right atrium and the right ventricle only
c. where blood enters the aorta
d. where blood enters the pulmonary arteries
e. between the left atrium and the left ventricle, and between the right atrium and the right ventricle
ANSWER: e
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The building of a large organic molecule from small subunits involves multiple ________.
A. hydrosynthetic reactions B. hydrolysis reactions C. osmotic reactions D. dehydration synthesis reactions
Which of the following is true of osmosis?
A) Osmosis only takes place in red blood cells. B) Osmosis is an energy-demanding or "active" process. C) In osmosis, water moves across a membrane from areas of lower solute concentration to areas of higher solute concentration. D) In osmosis, solutes move across a membrane from areas of lower water concentration to areas of higher water concentration.
An Antennapedia (Antp) mutant in Drosophila has legs in place of antennae. This is caused by __________
A) activation of the Antp gene in the head region instead of in the thorax B) the product of an abdominal segment gene being expressed in the head C) a chromosomal error that shifts this Antp gene to the anterior end of the complex D) the interaction of an inhibitor gene of the bithorax complex with the Antp mutation E) loss of function of the Antp gene
After a meal of raw oysters, a woman begins to feel numbness and tingling in her hands and feet. By the time she gets to the hospital, she can no longer move and is having difficulty breathing. The lab finds a protist with two flagella
The organism is a(n) A) apicomplexan. B) euglenozoan. C) dinoflagellate. D) radiolarian. E) brown alga.