Mannitol salt agar contains mannitol sugar, a pH indicator, and high concentration of salt (7.5% sodium chloride). Sugar could be fermented by some organisms, and high salt content is inhibitory to some bacteria. This medium is an example of a ___________ medium.
A. selective and differential
B. Selective
C. Enriched and Selective
D. Enriched
E. Differential
Ans: A. selective and differential
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A. regulatory proteins B. protective proteins C. transport proteins D. cell-signaling proteins E. motor proteins
Active phytochrome controls
a. flowering and seed set. b. seed germination. c. stem branching and elongation. d. expansion of leaves. e. all of these.
A human plus all of its resident microbiota is a(n) _____
Fill in the blank(s) with the appropriate word(s).
In the process of peristalsis:a
waves of muscular contractions force food down the digestive tract. b. chemical digestion of food takes place in the digestive tract. c. food is discharged from the bodies of unicellular animals. d. digestion occurs intracellularly within food vacuoles. e. digestion of food takes place outside the body of an animal.