During diffusion, how do the solute molecules move?
A) up a concentration gradient of solute molecules
B) down a concentration gradient of solvent molecules
C) down a concentration gradient of solute molecules
D) unpredictably with regards to a concentration gradient of solvent molecules
C
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In the experiment above, guppy color patterns (spots) were measured in populations exposed to increasing amounts of predation. From this you could conclude that ____ .
A. evolutionary changes take millions of years to appear
B. predators are less likely to catch and eat brightly colored guppies
C. predators are more likely to catch and eat brightly colored guppies
D. brightly colored guppies are more likely to reproduce in the presence of predators
E. predators do not affect the color patterns of guppies
An insect, such as a moth or cricket, detects sound ____
a. though specialized tympanic membranes located near the head b. through a thinned region of the exoskeleton that forms a tympanum c. through general mechanoreceptors on its skin d. by using a specialized organ that measures the frequency of vibration of the surrounding air particles
e. through a series of mechanoreceptors arranged in a lateral lineWhich of the following is responsible for the increase in girth (width) of trees?
A) primary growth B) secondary growth C) growth in apical meristems D) an increase in the width of vessel elements
The only mammalian cells that do not have a nucleus are ___.
What will be an ideal response?