Which feature is found in DNA?
A) Adenine (A) forms a base pair with cytosine (C).
B) The backbone of each strand is composed of alternating sugar and phosphate groups.
C) Complementary strands are held together by ionic bonds.
D) DNA remains condensed in a short linear form both before and after cell division.
B
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Starting from the root of a phylogenetic tree, any node that is shown farther from the root than other nodes, means
A. the two species (or groups of species represented) at the farthest node diverged by sympatric speciation.
B. that only those species at the farthest node, from the root, are in a clade.
C. convergent evolution has selected for the species (or groups of species represented) to be similar.
D. the species (or groups represented) diverged most recently from a common ancestor.
E. the species (or groups of species represented) are in the outgroup.
photosynthesis requires ___________.
Fill in the blank(s) with the appropriate word(s).
Which of the following techniques is similar to a molecular "copy machine" for DNA?
A. gel electrophoresis B. restriction enzymes C. DNA sequencing D. polymerase chain reaction (PCR)
The removal of introns and joining of exons in eukaryotic DNA, forming an mRNA molecule with a continuous coding sequence; Occurs before mRNA leaves the nucleus
What will be an ideal response?