Which category of bacteria provides the greatest benefit to production of crop plants?

a. spirochetes
b. heat-loving T. aquaticus
c. nitrogen-fixing bacteria
d. Agrobacterium
e. L. acidophilus


c

Biology & Microbiology

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The RNase known as ________ helps cut eukaryotic double-stranded RNAs to form the miRNA species.

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology

The two amino acids depicted above both have side groups (R groups) that are

a. acidic and polar. b. uncharged and nonpolar. c. basic and polar. d. positively and negatively charged and nonpolar. e. uncharged and polar.

Biology & Microbiology

A ___ resource is one that is gone for good once it is depleted

a. renewable b. global warming c. pollution d. carbon footprint e. nonrenewable

Biology & Microbiology

All of the following reasons—except one—explain why so many sperm are ejaculated when only one

is needed for fertilization. Which is the incorrect reason? a. Many sperm die by phagocytosis in the female tract. b. Many sperm swim up the wrong oviduct. c. The enzymes from many acrosomes are needed to penetrate the corona radiata. d. Many male pronuclei must be present in order to fuse with each female pronucleus. e. Many sperm die as a result of the unfavorable pH in the vagina.

Biology & Microbiology