Which of the following is not involved in achieving and maintaining an erection?
A. nitrous oxide
B. blood
C. smooth muscle
D. urethra
E. cGMP
Answer: D
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Cell walls containing ________ provide the best protection from drying
A) polysaccharides B) triglycerides C) waxes D) peptidoglycan E) sterols
One hallmark of speciation is ____
a. lack of change in reproductive behaviors b. a decrease in balanced polymorphisms c. an increase in fixed alleles d. decreased genetic diversity of populations
e. end of gene flow between populationsWhich type of molecule is composed of (CH2O) units?
A) carbohydrate B) lipid C) nucleic acid D) protein
The replisome has two main subcomponents. They are
A. the replication folk and the sliding clamp subunit. B. the primosome and the sliding clamp subunit. C. the replication folk and the DNA pol III enzymes. D. the DNA pol III enzymes and the sliding clamp subunits. E. the primosome and the DNA pol III enzymes.