A group of individuals of a single species that occupy the same general area defines a
A) population.
B) community.
C) subspecies.
D) clone.
Answer: A
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Which of the following illustrates Mendel’s law of independent assortment?
a. a dihybrid cross b. a Punnett square c. the first division in meiosis d. a monohybrid cross
Repressible genes are usually actively transcribed when:a
repressor molecules bind to the promoter. b. the end product of the enzymes encoded by these genes is low. c. tryptophan accumulates in the cell. d. quantities of precursor materials are high. e. there is no other substrate that can be used by the cell.
Which of these lines represents the pattern of change in mass over that time?
A) A B) B C) C
Sexual reproduction results in many benefits for a population, but not without some inconvenience; for example,
a. each participant must locate an appropriate mate. b. the time and effort required for finding a mate may mean that short-term benefits for survival are missed. c. sexual reproduction requires special cells to occur. d. all of the above