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
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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
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
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
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.