Genetic variation in bacterial populations cannot result from
A.) mutation.
B.) transduction.
C.) meiosis.
D.) conjugation.
E.) transformation.
Ans: C.) meiosis.
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What is the primary function of the transverse tubules?
A. They conduct action potentials from the surface of the muscle fiber to internal regions near myofibrils. B. They act as a channel for Ca2+ ions during excitation-contraction coupling. C. They form cross-bridges between actin and myosin during muscle contraction. D. They attach troponin to tropomyosin. E. They attach muscle fibers to skeletal elements to exert force.
Both changes in chromosome number and chromosome structure are believed to have resulted in novel genomes, leading to new species
Indicate whether the statement is true or false
An optimal strategy for an animal in procuring food would involve all of the following EXCEPT:
a. securing essential nutrients. b. maximizing the size of each prey item. c. minimizing the risk of predation during foraging and feeding. d. maximizing energy gained. e. minimizing energy expended.
A collection of bacterial clones each of which contains a portion of the gene sequences of an organism is known as a microbiome of that organism's genome
Indicate whether the statement is true or false