In order for DNA molecules to undergo recombination, ____.
A. they must be from the same species
B. their strands must separate as in replication
C. they must be cut and spliced at specific nucleotide sequences
D. one of the two DNA strands must be degraded
E. they must first be transcribed
Answer: C
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Which of the following is an advantage of the human circulatory system over the circulatory system of tarantulas?
a. The human system functions under lower pressure. b. The human system requires less energy to operate. c. The human system allows direct contact between tissues and blood. d. The human system can direct the relative amount of flow of blood to different organs. e. The human system permits more rapid exchange of gases between respiratory pigment and tissues.
Which term describes the vital statistics of a population?
a. ecostatistics b. population ecology c. demographics
d. biostatistics e. community ecology
In a Hardy-Weinberg population with two alleles, A and a, that are in equilibrium, the frequency of the allele a is 0.4. What is the percentage of the population that is homozygous for this allele?
A) 4 B) 16 C) 32 D) 36 E) 40
Most CO2 reacts with water inside red blood cells to form bicarbonate due to the enzymatic activity of __________.
Fill in the blank(s) with the appropriate word(s).