The bones that amplify sound reaching the eardrum are indicated by the letters ____
a. A and B
b. A, B, and C
c. B and C
d. C and D
e. C, D, and F
ANSWER: b
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Which of the following is NOT true of the NMDA receptor?
a. It is an ionotropic receptor. b. It opens channels for both sodium and calcium. c. It is blocked by NBQX. d. It can activate second messengers. e. It is responsive to both glutamate and glycine.
Symbionts such as Aeromonas veronii of leeches and Buchnera symbionts of insects are transmitted ________ to ensure the safe transfer of the symbiont to the next host generation
A) vertically to offspring B) horizontally through infected water C) horizontally through infected secondary hosts D) vertically through the air
Which type of survivorship curve can be depicted as a straight line (where mortality rates are roughly equivalent at all life stages)?
A. Type I B. Type II C. Type III
Some animal viruses may enter a ____ stage in which the virus remains in the cell in inactive form
a. latent b. virulent c. temperate d. transformation e. lytic