Botryococcus braunii is an alga that produces hydrocarbons at (10/20/30 ) percent of its dry weight and could be harvested in the future as an alternative fuel
What will be an ideal response?
30
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In humoral immunity, cells that are produced by activated B cells and function by secreting antibodies are called
A. cytotoxic T cells. B. helper T cells. C. plasma cells. D. macrophages. E. memory cells.
E = unattached earlobes. e = attached earlobes. In the cross of Ee and Ee, the chance of a child with unattached earlobes is _____.
a. 3/4 b. 1/4 c. 1/2
Allergies occur when
A) too much complement is released into the blood. B) antibodies malfunction and attack "self" cells. C) mast cells release histamine in response to harmless substances. D) foreign MHC proteins trigger an immune response.
If a new anti-cancer drug is found effective in initial tests with mice, what do researchers conclude?
(a). If the drug was effective in a large number of mice, it will therefore be effective in humans. (b). If the drug was effective in a small proportion of mice, it will be effective in a small proportion of humans. (c). The mice have provided a positive control in this experiment that proves the drug is effective in humans. (d). The drug is effective in the mouse model; it must still be tested in humans. (e). The effect of the drug on mice has no bearing on the effect of the drug on humans.