The two layers of fluid-filled membranes that are
used to separate the lungs from other organs in
humans are called
a. larynx.
b. pharynx.
c. bronchial.
d. pleural.
e. none of these.
Answer: d
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If the enzyme catalyzing the N to O reaction is allosterically stimulated, there will be a build-up of
which compound(s)?
a. N b. O c. P d. Q e. P and Q
Translation stops when
a. enzymes attach to the mRNA at the end of the mRNA transcript. b. a certain number of codons have been read specified by the DNA gene. c. one of the three stop codons is encountered. d. the cell runs out of tRNA. e. more than one of these things happens
Genetic equilibrium and allele frequencies are
maintained by all EXCEPT which one of the following? a. lack of gene flow. b. large population interbreeding freely c. differential survival and reproduction d. random mating e. absence of mutations
Dr. Ratard was trying to determine the cause of a mysterious epidemic affecting fish in the gulf of New Mexico. His proposal that the deaths were caused by an organism called a protist is considered a(n) ________
A. conclusion. B. hypothesis. C. theory. D. experiment. E. data set.