Humans become infected with Toxoplasma gondii primarily by
A) being bitten by a tick.
B) direct skin penetration.
C) ingesting food or water contaminated with cysts.
D) ingesting meat containing the parasite.
E) intimate contact with another person.
D
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Animal cells typically achieve cytokinesis by:
A. binary fission. B. forming a cell plate across the middle of the cell. C. forming a cleavage furrow that pinches the cell into two. D. chromosome condensation. E. chromosome elongation.
What do sponges and cnidarians have in common?
A. Organization of cells into tissues B. Symmetry C. Mobility D. None of the above are characteristics that sponges and cnidarians share
Which of the stages or structures in Figure 51-1 was formed by the process of gastrulation?
a. 1 b. f c. g d. 3 e. 5
Some microbial control agents are able to ________ cell proteins by breaking bonds that maintain the native state, three-dimensional configuration of the proteins.
What will be an ideal response?