Which of the following is not a feature of a population?
A) size
B) density
C) number of species
D) distribution
C
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Which medium can be described as containing bile salts and dyes (e.g., bromothymol blue and acid fuchsin) to slow selectively the growth of most nonpathogenic gram-negative bacilli found in the gastrointestinal tract and allow Salmonella spp. and Shigella spp. to grow?
a. Thayer-Martin agar b. MacConkey agar c. Phenylethyl alcohol (PEA) d. Hektoen enteric agar
Many bacteria facilitate the uptake of iron by secreting low molecular weight molecules, called ________, to form complexes with the iron that can then be readily transported into the cell.
Fill in the blank(s) with the appropriate word(s).
The products of photosynthesis move from the leaf to other parts of the plant via
A. xylem. B. cortex. C. xylem and cortex. D. phloem. E. phloem and cortex.
The evolutionary conversion of a structure, gene, or gene complex from one function to another was called ________ by Stephen Jay Gould and Elisabeth Vrba
Fill in the blank(s) with correct word