There are currently two large, permanent bridges that span the Panama Canal. The bridges are about eight miles apart. If snapping shrimp avoid swimming at night and avoid swimming under shadows, then what do these bridges represent for the snapping shrimp
A) sources of refuge
B) geographic barriers
C) sources of a hybrid zone between the two bridges
D) sources for increased gene flow
Answer: B
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The formation of new DNA does NOT require energy
Indicate whether the statement is true or false.
The accompanying figure best illustrates ____
a. DNA repair b. semiconservative replication c. the action of the ligases d. the binding of initiator proteins e. DNA hybridization
Describe the process of ‘reading’ a microarray in order to compare the expression of genes in two different tissues--
one that is normal and one that represents a disease such as cancer. What will be an ideal response?
In the comparison of a DNA molecule to a twisted ladder, the upright sides of the ladder are
A) nitrogenous bases linked to phosphate. B) nitrogenous bases linked together. C) deoxyribose linked to phosphate. D) deoxyribose linked to sulfate. E) hydrogen bonds between bases.