Reduction in __________ growth is used as a sensitive indicator of air pollution
a. fungus
b. mushroom
c. algae
d. lichen
e. puff balls
D
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Bdellovibrio
A. prey on other bacteria. B. are parasites of plants. C. may fix nitrogen. D. are photosynthetic.
The movement of genetic material between organisms by any mechanism other than descent is known as ____
a. lateral gene substitution b. polyphyly c. hybridization
d. cloning e. horizontal gene transfer
A controlled experiment _____
A) is repeated many times to ensure that the results are accurate B) includes at least two groups, one of which does not receive the experimental treatment C) includes at least two groups, one differing from the other by two or more variables D) includes one group for which the scientist controls all variables
Your roommate is experiencing heartburn and asks you to purchase her an antacid. Chemically speaking, how do you know that the antacid will help eliminate her pain?
A) It has a low pH to balance the acidity in her digestive tract. B) It is a buffer and will prevent the pH in her digestive tract from changing. C) It is probably high in H+. D) It has a higher OH- concentration to increase the pH in her digestive tract.