A heart murmur is caused by

A. a greater-than-normal force of contraction of the right atrium.

B. a constriction of the pulmonary artery.

C. blockage of the aorta.

D. the heart valves not functioning properly.

E. a greater-than-normal force of contraction of the left atrium.


D. the heart valves not functioning properly.

Biology & Microbiology

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Allopolyploidy is defined as ____ chromosome number due to ____

a. maintenance of; interbreeding within a single species b. decreased; hybridization of different species c. decreased; interbreeding within a single species d. increased; hybridization of different species e. increased; interbreeding within a single species

Biology & Microbiology

Excess transpiration:a

may be harmful to a plant. b. causes an increase in turgor pressure. c. is a synonym for precipitation. d. occurs mainly in the winter. e. is automatically counteracted by absorbing water from the soil.

Biology & Microbiology

Which one of the following is most similar to the mechanism of an enzyme inhibitor?

A) keeping someone from parking by parking in their designated spot B) driving the wrong way on a one-way street C) forgetting to put a cap back on a pen D) changing the tires on a car

Biology & Microbiology

2 steps of a cell cycle

What will be an ideal response?

Biology & Microbiology