In the tropics, warm but nutrient-poor water above continental shelves is often occupied by ____
a. coral reefs
b. kelp forests
c. rocky shores
d. salt marshes
e. phytoplankton blooms
ANSWER: a
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Likely representative of some of the earliest bacteria, what do we call prokaryotes that are capable of harnessing the energy from sunlight to drive the synthesis of organic compounds from CO2?
a. phototrophs b. anaerobes c. extremophiles d. halophiles
Which item, A, B, or C, is a gated ion channel in the postsynaptic membrane?
The area in the figure marked “A” is likely to
become a. vacuoles. b. Golgi bodies. c. mitochondria. d. chloroplasts in some cells. e. endoplasmic reticulum.
A blocked coronary sinus would block blood flow:a
into the superior vena cava. b. into the inferior vena cava. c. into the pulmonary arteries. d. returning from the pulmonary arteries. e. returning from the coronary circulation