Replication of DNA
1.produces RNA molecules.
2.produces only new DNA.
3.produces two molecules, each half-new and half-old DNA joined lengthwise to each other.
4.generates excessive DNA, which eventually causes the nucleus to divide.
5.is too complex to characterize.
3
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When communities of organisms interact with their physical environment they form a(n)
A. population. B. organism. C. community. D. ecosystem. E. macromolecular community.
Which of the following was NOT a kingdom in Linnaeus's taxonomy?
A. Animal B. Mineral C. Protist D. Plant
In the biosphere, which of the following is NOT constantly recycled?
Select one: a. carbon b. nitrogen c. water d. energy e. phosphorus
Which of the following lymphoid organs has the immunological function of filtering pathogens from the blood?
A. tonsils B. thymus C. spleen D. lymph nodes E. galt