Nitrogen fixing bacteria are parasitic and will almost always kill the host plant
A. True
B. False
B. False
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What happens to the chest cavity and air pressure in the lungs during exhalation?
a. The chest cavity increases, and air pressure decreases. b. The chest cavity increases, and air pressure also increases. c. The chest cavity decreases, and air pressure increases. d. The chest cavity decreases, and air pressure also decreases.
The __________ circuit carries blood from the heart to body tissues, and then returns it to the heart.
Fill in the blank(s) with the appropriate word(s).
What are the characteristics of two species with a distant evolutionary relationship?
A. Few similarities between their proteins B. Almost similar protein sequences C. Almost opposite protein sequences D. No similarities in their protein sequences. E. Missing amino acids in their sequences
________ culture techniques are based on the expansion of the microenvironment to allow abundant growth of a microorganism formerly restricted to a small ecological niche.
Fill in the blank(s) with the appropriate word(s).