The bacterium Rhizobium

A. enters plants through the root hairs.
B. All of the answer choices are correct.
C. triggers the development of root nodules in legumes.
D. breaks the triple covalent bond in N2.
E. lives symbiotically within plant cells.


B. All of the answer choices are correct.

Biology & Microbiology

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Which pressure is the distending force on the lungs?

A) rebound pressure (elastic recoil) B) atmospheric pressure C) intrapleural pressure D) transpulmonary pressure E) intra-alveolar pressure

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About __________ of the total energy the sun releases strikes the atmosphere

a. one-tenth b. one-hundredth c. one-thousandth d. one-millionth e. one-billionth

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A variant of a trait coded for by a gene is known as ________.

a. DNA b. an allele c. a homozygote d. a hybrid

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