Which statement is not true about conifers?
(a) Conifers are gymnosperms.
(b) All conifers belong to the genus Pinus.
(c) All conifers have naked seeds.
(d) Conifers are heterosporous.
(b) All conifers belong to the genus Pinus.
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Based on oxygen requirements and metabolic strategies, isolating an epsilonproteobacterium from ________ would likely be MOST fruitful
A) anoxic and sulfate-rich waters B) a plant's rhizosphere C) sulfate-rich anoxic-oxic interfaces D) sulfide-rich soils
The production of heterophile antibody is associated with
A. tularemia. B. brucellosis. C. plague. D. infectious mononucleosis.
Thorough mixing of oxygen and nutrients within a lake occurs in:
a. winter and summer b. winter and spring c. spring and summer d. spring and autumn e. summer and autumn
Which of these is not produced by phagocytes to destroy engulfed microorganisms
a. hydroxyl radicals b. superoxide anion c. hydrogen peroxide d. histamine