One criticism of the Miller-Urey experiment among scientists is it ____
a. was based on an oxidizing environment
b. was likely contaminated with modern atmosphere
c. added too much energy
d. was based on a reducing environment
e. did not add the proper starting components
ANSWER: d
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Lymphocyte receptors are encoded by genes that are assembled by rearrangement and mutation of what molecules?
A. pre-mRNA B. mRNA C. tRNA D. DNA
A psychoactive drug that delays the removal of a neurotransmitter from the synapse will ________
A) dampen the response of the receiving neuron B) prolong the effect of the neurotransmitter on the receiving neuron C) prevent the neurotransmitter from working D) bind to the receptor and affect the receiving neuron in the same way as the neurotransmitter
The responsible management (use and conservation) of the earth's resources indefinitely is called ________
A) the maximum sustainable yield B) landscape ecology C) an environmental conservation trust D) sustainable development
A symbiotic association between a fungus and a green alga or a cyanobacterium is called a
A. lichen. B. mycorrhiza. C. kelp. D. mushroom. E. protist.