Capsicum binds to a calcium channel in the nociceptor’s cell and triggers an influx of calcium into the
cell. What happens if the same receptors are placed in an environment that is unusually warm (such as
48?C) but lacks capsicum?
a. The channels again open, allowing an influx of calcium.
b. The channels stay closed.
c. The channels open, but much more slowly than they would if capsicum is also present.
d. The channels open and are unable to close.
e. The channels are unable to open.
A
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A species that is involved in a facultative mutualism with another:
A. can utilize a variety of different resources. B. is reliant on the relationship for survival. C. will most likely co-evolve with the other species. D. should quickly develop adaptations in direct response to the other species. E. can only interact with that particular species.
The average number of children born to women of a population during their reproductive years is the
a. total fertility rate (TFR). b. birth rate. c. growth rate. d. population density. e. reproductive capacity rate (RCR).
All of the following statements are true about the plasma membrane except?
A. Proteins are involved in signal transduction across the cell membrane B. Membrane proteins catalyze chemical reactions C. Integral proteins make channels in the membrane D. Small ions can cross the membrane via simple diffusion
Which statement provides the best evidence that there is a common genetic code that demonstrates the unity of life?
A) Bees, birds, and bats all have wings and fly. B) Many insects can pollinate only a particular species of plant due to many generations of evolutionary adaptation. C) Through genetic engineering, a gene from a firefly can be inserted into a bacterium to make it glow.