When Nitrobacter utilizes nitrite produced from ammonia by Nitrosomonas to obtain energy by converting the nitrite to nitrate, the relationship between the two organisms is ________.

A. mutual
B. commensal
C. amensal
D. parasitic


Answer: B

Biology & Microbiology

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Fungi produce spores by which of the following processes?

A) binary fission B) mitosis C) meiosis D) gene conversion E) cloning

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In order to fit the X-ray crystallographic data, the two DNA strands must be ____ to each other

a. complementary b. uncomplementary c. parallel d. antiparallel e. semiconservative

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A horseshoe crab walking on the bottom of shallow coastal waters, feeding on algae, invertebrates, and other small life forms, describes the horseshoe crab's ________

Fill in the blank(s) with correct word

Biology & Microbiology

Conifers transmit chloroplast only through pollen. This:

a. leads to parthenogenesis. b. inhibits parthenogenesis. c. leads to recombination in chloroplast DNA when ovule and pollen chloroplast merge. d. leads to imprinting of conifer nuclear genes.

Biology & Microbiology