For which of the following would growth on blood agar be a good diagnostic tool?
a. streptococci
b. staphylococci
c. all Gram-positive cocci
d. enterococci
Answer: a. streptococci
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The common building block of ________ is the phenylpropene unit, which consists of a hydroxylated six-carbon aromatic benzene ring and a three-carbon linear side chain.
Fill in the blank(s) with the appropriate word(s).
Which skin disorder is caused by a type of herpes virus?
a. acne b. vitiligo c. cold sores d. malignant melanoma e. squamous cell carcinoma
The ________ of flowering plants and insects is responsible for much of the diversity of these groups.
A. natural selection B. artificial selection C. coevolution D. natural history
Acetogens are anaerobic organisms that produce acetate as the main product of their metabolism. They are important in
A) the production of vinegar. B) the carbohydrate metabolism of the human gut. C) hydrothermal vent communities. D) the production of vitamin C.