Which of the following conditions would you use to enrich purple nonsulfur bacteria from lake sediments?
A) anoxic media with a good light source
B) mineral media with ammonia and oxygen in the dark
C) anoxic mineral media with an organic acid and a good light source
D) mineral media with nitrate and acetate in the dark
Answer: C
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In which X chromosome would the gene XIST have been transcribed?
a. The active X chromosome b. The condensed Barr body c. Both X chromosomes d. The maternal chromosome e. The paternal chromosome
A population of organisms that is reproductively isolated from other populations is considered a:
a. kingdom. b. phylum. c. genus. d. species. e. class.
Two forms of hemophilia are determined by genes on the X chromosome in humans. Assume that a phenotypically normal woman whose father had hemophilia is married to a normal man. What is the probability that their first daughter will have hemophilia?
A) zero B) 1/2 C) 1/4 D) 1/3 E) 100%
Why have more groups within the archaeplastids not developed complex multicellularity?
What will be an ideal response?