The movement of substances to regions of lower concentration is called
A. active transport.
B. diffusion.
C. pinocytosis.
D. pumping.
E. exocytosis.
B
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The relatively shallow part of the ocean extending from the low tide mark to the edge of the continental shelf is called the
A. surface zone. B. abyssal zone. C. neritic zone. D. littoral zone. E. limnetic zone.
In final preparation for a climb up Mt. Everest, climbers take up residence at base camp for a period of days to weeks before the climb. During this time, the climbers must acclimate physiologically to the low oxygen levels. Out of a group of ten climbers, one is unable to acclimate to the low oxygen levels, so he cannot make the final part of the climb. What would explain his lack of acclimation?
A. The levels of erythropoietin in his system are too low. B. The levels of hemopoietin in his system are too low. C. The levels of renin-angiotensin in his system are too low. D. The levels of adrenocorticotropin in his system are too low.
A bridge is formed between the activators at the enhancer and the proteins at the promoter and promoter proximal
region by ____.
a. hormones b. RNA polymerase II c. repressors d. inducers e. coactivators
How are the four major types of biological molecules similar in structure?
What will be an ideal response?