erection is
What will be an ideal response?
an autonomic reflex mediated predominantly by parasympathetic nerve fibers
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A scientist obtains the DNA sequence datafor a bacterial plasmid. The data includes As, Ts, and Gs, but no Cs. What
is the most likely cause of this result?
a. ddCs were omitted from the sequencing reaction. b. The cytosine deoxyribonucleotides were omitted from the sequencing reaction. c. DNA polymerase was omitted from the sequencing reaction mix. d. The ddG fluorescent tags were degraded. e. There is no cytosine in this DNA molecule.
The human protein TPA has domains that are genetically similar to domains from other proteins,
including epidermal growth factor and fibronectin. This is best explained by ____.
a. alternative splicing b. degeneracy c. exon shuffling d. the wobble hypothesis e. aminoacylation
One problem with using common names is that
a. many organisms may have the same common name. b. many common names may exist for the same organism. c. the common name may vary by language and region. d. all of the above are true.
What does the sliding filament model describe during muscle contraction?