Some species of Streptococcus, when grown on blood agar, produce a complete hemolysis with the formation of a clear zone around the colony; this is referred to as ________.
A. alpha-hemolysis
B. gamma-hemolysis
C. beta-hemolysis
D. None of the choices are correct.
Answer: C
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Apoptosis is Greek for "dropping off" and refers to the programmed cell death of cells that attach the petiole to the stem. When these cells die in the fall, the leaves drop. Cells in which part of the plant undergo apoptosis?
A. intercalary meristem B. node C. lateral meristem D. leaf E. apical meristem
Did Homo sapiens mate with Homo neanderthalensis? What will be an ideal response?
Figure 17.3
If the population of flowers illustrated in the accompanying Punnett square is in genetic equilibrium, the frequency of the homozygous dominant genotype in the new generation will be ____.
A. p2 B. 2pq C. p2 + q2 D. q2 E. p2 + 2pq
As a patch of scraped skin heals, the cells fill in the injured area but do not grow beyond that. This is an example of
A) density-independent inhibition. B) density-dependent inhibition. C) anchorage independence. D) growth factor inhibition.