What do bacterial cells do in transduction?
a. They take up pieces of DNA through the use of a virus.
b. They replicate DNA molecules.
c. They make replicate copies of one another.
d. They take up pieces of DNA that are released as other cells disintegrate.
Ans: a. They take up pieces of DNA through the use of a virus.
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A nucleotide may consist of
(a) deoxyribose or ribose. (b) purines or pyrimidines. (c) phosphate groups. (d) all of the above.
Which of the following statements about the strands of a newly replicated DNA molecule is correct?
A. Both strands are made up of newly assembled nucleotides. B. One strand is new and the other is from the original molecule. C. Both strands contain some nucleotides from the original molecule. D. The sugar-phosphate chains are conserved and new bases are inserted between them. E. The base pairs are conserved and new sugar-phosphate backbones are built up on them.
Which characteristics are consistent with a K-selected species? Where do humans fall on the r through K continuum?
What will be an ideal response?
Most of the primary plant body is made up of the _____ tissue system.
A. Vascular B. Dermal C. Root D. Ground E. Shoot