Identify the labeled structures in the cross section of a human penis in the picture.
What will be an ideal response?
A: erectile tissue
B: dorsal vein
C: dorsal artery
D: dorsal nerve
E: septum
F: skin: out
G: urethra
H: connective tissue
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Nuclear pores permit the passage of all the following except:
A. RNA only outward. B. proteins inward and outward. C. DNA molecules only outward.
If a mutation occurred in a flatworm such that the flame cells no longer functioned, what do you predict would be the consequence?
A. The parasitic forms could no longer hold onto their host. B. Excretory function would be impaired. C. Digestive function would be impaired. D. Nerve function would be impaired. E. Reproductive function would be impaired.
A certain unicellular eukaryote has a siliceous (glasslike) shell and autotrophic nutrition. To which group does it belong?
A) dinoflagellate B) diatom C) gymnamoeba D) foraminiferan E) cellular slime mold
Answer the following questions true (T) or false (F)
1. Streak plates are a useful way to obtain CFUs. 2. Agar is a useful compound in the microbiology lab because it is an excellent nutrient for bacteria. 3. Enrichment culturing may require use of controlled environmental conditions.