Which of the following is not a prion disease?

A) scrapie
B) tuberculosis
C) mad cow disease
D) Creutzfeldt-Jacob disease


B) tuberculosis

Biology & Microbiology

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Community ecology is best defined as the study of

A. plant distributions in a given region. B. mutual benefits between organisms at all scales in a region. C. the relationship between abiotic and biotic factors. D. how groups of species interact and form functional communities. E. global scale influences of major disturbances such as volcanos.

Biology & Microbiology

Plasma cells

A. secrete antibodies. B. function in allergic reactions. C. suppress immune reactions. D. activate B cells and other T cells. E. directly destroy target cells.

Biology & Microbiology

How were nitroglycerine's therapeutic benefits discovered?

a) the fact that dynamite factory workers with heart conditions had less angina on days that they worked b) by reading the literature c) through careful drug testing d) the fact that dynamite factory workers with heart conditions had more angina on days that they worked e) by prayer

Biology & Microbiology

Which of the following wavelengths of light would you expect to be reflected or transmitted by chlorophyll a?

A) blue B) green C) yellow D) red

Biology & Microbiology