Which type of organism would have the least chance of long-term survival in the given environment?
a. osmoconformers in seawater
b. euryhaline animals in fresh water
c. stenohaline animals that move between fresh water and seawater
d. osmoregulators in seawater
e. euryhaline animals in seawater
Answer: c. stenohaline animals that move between fresh water and seawater
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Which of the following would most likely contribute to uncontrolled cell proliferation (i.e., cancer)?
A. a mutant CDK that was active in the absence of its cyclin binding partner B. a mutant cyclin that cannot bind to its normal CDK binding partner C. a mutant microtubule synthesis/polymerization enzyme D. a mutant DNA replication mechanism causing extra chromosome copies E. a mutant kinetochore protein that causes reduced microtubule attachment
The tooth morphology of an animal is related to its diet
a. True b. False
The “conducting zone” of a neuron is found at the ____
a. axon b. dendrite terminal c. cell body d. axon hillock e. synapse
Which of the following would not be seen in a cross-section through the woody part of a root?
a. sclerenchyma cells b. parenchyma cells c. sieve-tube elements d. root hairs e. vessel elements