If the ? of surrounding soil is higher than that in living root epidermal cells, then water should
a. leave the root cells, making them flaccid.
b. enter the root cells, making them turgid.
c. leave the root cells, making them turgid.
d. enter the root cells, making them flaccid.
e. none of these accurately describe water movement.
B
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If a single-celled freshwater organism such as a
protistan is transferred to saltwater, which of the following is likely to happen?
a. The cell bursts. b. The cell shrinks. c. Salt is pumped out of the cell. d. Enzymes flow out of the cell. e. There is no effect.
A decrease in cortisol triggers a negative feedback
loop and causes release of a. adrenocorticotropin. b. cortisol. c. corticotropin releasing hormone. d. insulin. e. thyroxine.
The ____________________ are the first branches off the trachea entering the lungs. Fill in the blank(s) with the appropriate word(s)
Imagine that you are an archaeologist on a dig somewhere on an East Asian island and than you begin to excavate an area littered with stone tools that also has the remains of an ancient fire
Subsequent carbon dating of the charcoal from the fire yields a date of 100,000 years before the present. Given these circumstances, which species would you expect most likely set that fire? A) Australopithecus afarensis B) Homo erectus C) Homo ergaster D) Ardipithecus ramidus