An ________ is a region where the river meets the sea.
Fill in the blank(s) with the appropriate word(s).
estuary
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Concentrations of CFCs in the upper atmosphere are currently:
a. rising dramatically b. leveling off c. declining sharply d. undetectable e. rising slowly
Spikes are glycoproteins that can be found projecting from the viral capsid.
Answer the following statement true (T) or false (F)
A bacterial broth culture is diluted by a factor of 100,000, and 0.1 mL of the dilution is spread over the surface of an agar plate. The next day, 123 colonies are observed on the plate. What was the concentration of bacteria in the broth?
What will be an ideal response?
Based on the way natural selection works, what is the best way to make use of antibacterial soap?
A) Always use it because most bacteria will cause illness. B) Never use it because all bacteria are harmless. C) Never use it because bacteria will evolve to become resistant to it. D) Always use it because it is unlikely that bacteria will evolve to become resistant to it. E) Use it only when you need to be free of bacterial contamination, so bacteria will be less likely to evolve resistance to it.