Most known microorganisms maintain their internal pH ________.
A. near neutral (pH 7)
B. slightly alkaline (pH 8-10)
C. slightly acidic (pH 4-6)
D. near their optimum growth pH
Answer: A
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Plasmids are ____
a. circular RNA elements b. linear DNA elements c. circular DNA found in the nucleus d. circular DNA found in the cytoplasm e. linear RNA elements
The eighteenth century naturalist __________
devised a much simpler naming system that we still use. a. Carolus Linnaeus b. Louis Pasteur c. Robert Koch d. Rosa canina e. all of these
Assume that the somatic cells of a male contain one pair of homologous chromosomes (e.g., AaAb) and an additional chromosome without a homolog (e.g., W)
Which chromosomal combinations would be expected in the meiotic products (spermatids) of a single primary spermatocyte? (There may be more than one answer.)
What happens to the photosynthetic reactions when no sunlight is present?
What will be an ideal response?