The anatomical structure identified with the letter "H" in the accompanying figure is the ____
a. myocardium
b. pulmonary veins
c. inferior vena cava
d. right atrium
e. heart apex
ANSWER: c
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After a fragment of DNA containing the gene of interest has been inserted into a vector, how are the gaps between the two pieces of DNA sealed together?
A. DNA polymerase catalyzes the formation of hydrogen bonds in the DNA backbone. B. DNA gyrase creates tension in the DNA backbone to hold the molecule together. C. DNA helicase causes the double helix to wind into its stable form. D. DNA ligase catalyzes the formation of covalent bonds in the DNA backbone. E. Restriction enzymes have the ability to join the two DNA fragments.
Psilotum lacks
a. roots. b. a mechanism to take up water and minerals. c. vascular tissue. d. alternation of generations.
AluI is an example of which type of transposable element commonly found in the genome of humans?
A) LINE elements B) SINE elements C) P elements D) Copia elements E) Ty elements
Discuss coevolution as it relates to predator-prey interactions. Include a brief discussion of two
specific examples. What will be an ideal response?