What is the purpose of steam during Schaeffer-Fulton endospore staining? What do you expect would happen if steam were not used?
What will be an ideal response?
To allow the dye to penetrate the spore coat. If the steam were not used then the dye wouldn’t penetrate the spore coat.
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A type of transport of a solute across a membrane, up its concentration gradient, using protein carriers driven by the expenditure of chemical energy is known as
A. osmosis. B. diffusion. C. facilitated transport. D. active transport. E. exocytosis.
Fossils of the earliest known true hominins are
approximately how many millions of years old? a. more than 20 b. about 10 c. between 7 and 2 d. less than 0.5 e. none of these
Activation of the sympathetic nervous system
a. speeds up heart beat and respiratory rate. b. increases the flow of watery saliva. c. stimulates peristaltic contractions of the intestinal system. d. slows heartbeat and lowers blood pressure. e. allows the body to relax rather than prepare for fight or flight.
The percentages of a population at different ages are known as the:a
growth rate. b. age structure. c. biotic potential. d. density. e. fecundity.