The only helminth disease of humans spread by an insect vector is
A. ascariasis.
B. fascioliasis.
C. filariasis.
D. hydatid disease.
E. schistosomiasis.
Answer: C
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________ immunity is an epidemiological concept that explains the resistance of a population to infection and the spread of an infectious organism due to the immunity of a high percentage of the population.
A. Innate B. Experimental C. Herd D. Natural
After bringing a small plant into the biology lab, you prepare microscope slides of the shoot. Near the tip of the shoot, you observe a dense patch of cells that seem to be actively dividing in a way that would cause the shoot to continue growing in length. This patch of cells is the
A. vascular bundle. B. apical meristem. C. lateral meristem. D. intercalary meristem. E. tracheid.
With sexual reproduction, two genes for the same
trait that are slightly different are called __________. Fill in the blank(s) with the appropriate word(s).
Diversity among the oligosaccharide chains found in the carbohydrate coating of the cell surface can be achieved in which of the following ways?
(a) varying the types of sugar monomers used (b) varying the types of linkages between sugars (c) varying the number of branches in the chain (d) all of the above