Which one of the following statements about gene regulation is incorrect?
A. Gene regulation occurs at the level of the
chromosome.
B. Gene regulation occurs at the level of
transcription.
C. Gene regulation occurs only in
prokaryotes.
D. Gene regulation occurs at the translational
level.
E. Gene regulation occurs at the posttranslational
level.
C
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A patient is complaining of erectile dysfunction. Based on what you know about the physiology of erections, what likely cause will you look for in your workup?
A. Excessive caffeine consumption B. Atherosclerosis C. Damage to the baculum D. Damage to the vas deferens
The type of reproductive isolation in which two populations live in the same habitat but remain isolated from one another due to one being active during the daytime only and the other being active only during the night is
A. gametic isolation. B. mechanical isolation. C. behavioral isolation. D. sexual selection. E. temporal isolation.
The major drainage structure within the lymphatic system is the ____
a. spleen b. tonsils c. right and left thoracic ducts d. thymus gland e. thoracic duct
Select the mismatched pair of Phylum Mollusca classes and their examples.
A. Cephalopoda-nautilus B. Bivalvia-snails C. Polyplacophora-chitons D. Gastropoda-slugs E. Gastropoda-nudibranchs