A technique called the ____________________ has revolutionized molecular biology because it is not as labor
intensive or time consuming as DNA cloning techniques. Fill in the blank(s) with the appropriate word(s).
polymerase chain reaction
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Communities on hard substrate are often found distributed
a. randomly. b. equally spaced out. c. equally spaced along a vertical gradient. d. in patches.
The effects of nerve gas prevent the removal of acetylcholine from synapses by interfering with its ____
a. diffusion away from the synaptic cleft b. enzymatic degradation c. active pumping back into the neuron d. binding to its respective receptor e. ability to flux ions across the membrane of the receiving neuron
All of the following factors can cause rapid evolutionary "jumps" except ________
A) single alleles with major effects on life history B) hybridization between species, producing a form that differs from both parents C) stabilizing selection on homeotic genes D) horizontal gene transfer between unrelated organisms E) transposable genetic elements, or transposons
Human chromosome 3 is classified as a(n)
a. sex chromosome. b. sister chromatid. c. autosome.