Answer the question using the accompanying figure. The benthic province includes the intertidal zone, represented by
letter ____, and the abyssal zone, represented by letter ____.
a. G; H
b. B; H
c. E; H
d. B; C
e. E; F
ANSWER: b
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Who of the following was the first to observe and accurately describe microorganisms?
A. van Leeuwenhoek B. Pasteur C. Tyndall D. Lister
Deforestation in the boreal forests is due primarily to:
a. commercial logging for rare woods to be used in furniture. b. commercial logging subsistence agriculture. c. clear-cut logging for industrial wood. d. slash-and-burn agriculture for farming e. slash-and-burn agriculture for cattle ranching.
Why is nitrogen fixation an essential process?
A) Nitrogen fixation can only be done by certain prokaryotes. B) Fixed nitrogen is often the limiting factor in plant growth. C) Nitrogen fixation is very expensive in terms of metabolic energy. D) Nitrogen fixers are sometimes symbiotic with legumes.
Obligate anaerobes may be cultured in the laboratory
A) in a reducing medium. B) in a standard incubator. C) in standard Petri plates. D) on blood agar plates. E) in standard complex media.