Immunoglobulins inactivate microbes in all of the following ways EXCEPT via
A. binding toxins.
B. perforating membranes or binding toxins.
C. perforating the microbial cell membrane.
D. linking microbes to complement proteins.
E. opsonization.
Answer: C
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Starting with a fertilized egg (zygote), a series of five cell divisions would produce an early embryo with how many cells?
A) 4 B) 8 C) 16 D) 32 E) 64
Intercalating agents, such as acridine orange, are mutagens because they
A) promote transitions. B) remove amine groups. C) attach to purines causing distortions. D) add ethyl or methyl groups. E) fit between stacked bases and disrupt replication.
According to the intermediate disturbance hypothesis, ____
a. species richness becomes greatest in between disturbances of moderate intensity or frequency b. a disturbance is necessary during succession in order to stabilize the community c. community succession is highly predictable d. competition and other species interactions are the most important factors in shaping community structure e. a community reverts to a climax state after a disturbance
Transport of materials through an epithelial cell is called ________.
Fill in the blank(s) with the appropriate word(s).