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.
(d). The drug is effective in the mouse model; it must still be tested in humans.
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A clamp connection is
A. a ring of hyphae produced by some fungi that is used to snare nematodes. B. a bypass formed during cell division in basidiomycetes that aids distribution on nuclei. C. the connection of a basidiospore to the basidium. D. the sticky substance that holds shelf fungi onto trees. E. the hyphae that hold crustose lichens onto rocks.
Peptide hormones activate ___________________ systems that relay the hormone signal to the inside of a target cell. Fill in the blank(s) with the appropriate word(s)
What part of the respiratory system does cigarette smoke most adversely affect?
A) alveoli B) trachea C) bronchi D) diaphragm
Which antibody has the shape of a pentamer, or five-sided arrangement?
A) IgM B) IgA C) IgG D) IgD