A decrease in the production of C3 would result in
a. increased susceptibility to infection.
b. increased numbers of white blood cells.
c. increased phagocytosis.
d. activation of C5 through C9.
e. none of the above
Answer: a. increased susceptibility to infection.
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Why does countercurrent exchange optimize gas exchange across some gills?
a. It sustains an optimal thermal environment for gas exchange. b. It optimizes perfusion to the respiratory surface. c. It sustains an optimal respiratory gas concentration gradient, allowing diffusion to occur across the entire respiratory surface. d. It optimizes delivery of the respiratory medium to the respiratory surface. e. It minimizes the area of diffusion.
In mitosis, if a parent cell has 12
chromosomes, each daughter cell will have how many chromosomes?
a. 48 b. 24 c. 12 d. 6 e. 3
Most UTI infections in the population are a result of catheterization in a hospital setting
Indicate whether the statement is true or false
When comparing the DNA sequences from two individuals, you notice that an adenine at position 513 in one species is a cytosine in the other species. This is an example of:
What will be an ideal response?