The image in the above photograph is a prime example of ____
a. double mutualism
b. associative commensalism
c. interference competition
d. team predation
e. parasitism
ANSWER: c
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The actin cytoskeleton is associated with which type of cell movement?
A. movement of cilia B. ameboid crawling C. transport of organelles within a cell D. Answers b and c are both correct.
When a neuron undergoes a change in membrane potential that is proportional to (i.e., varies depending on) the strength of the stimulus given to that neuron, this is referred to as a/an
A. equilibrium potential. B. action potential. C. resting potential. D. reversal potential. E. graded potential.
If the proton pumps of guard cell were damaged, transpiration would decrease.
Answer the following statement true (T) or false (F)
Even though all people are exposed to potential carcinogens on a daily basis, we do not all develop cancer. Why?
a. The carcinogens only affect tumor suppressor genes. b. Human cells are resistant to carcinogens until we are approximately 50 years old. c. DNA repair mechanisms through pathways activated by tumor suppressor genes are able to correct some of the mutations that occur. d. Humans' oncogenes protect us from most of the carcinogens we are exposed to.