Inside nitrogen-fixing nodules, one N2 molecule is converted into two

A. NH3.
B. N.
C. NO3.
D. NO.
E. NO2.


Answer: A

Biology & Microbiology

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Which of the following refers to a symbiotic association between plant roots and fungi?

A. lichens B. geosmins C. extremophile D. mycorrhizae

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Male mallards have had emerald green head

feathers and wings with metallic blue patches for hundreds of years, whereas female mallards have been drab, brown-feathered ducks. This phenotypic situation suggests that mallards may be an example of a. directional selection. b. polyploidy. c. allopatric speciation. d. disruptive selection. e. sexual selection.

Biology & Microbiology

Which of the following is not transported within the plant by the xylem and/or the phloem?

A. sucrose B. water C. starch D. growth-regulating hormones E. dissolved minerals

Biology & Microbiology

A person with only one allele for a recessive condition who does not have the condition is called a ________

Fill in the blank(s) with correct word

Biology & Microbiology