In the process of biological evolution, new species may evolve through exchange of genes from one species to another. This process is called
In the process of biological evolution, new species may evolve through exchange of genes from one
species to another. This process is called
B. horizontal gene transfer.
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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.
If a physician wanted to collect spinal fluid for analysis s/he would want to place a needle:a
between the dura mater and skull. b. between the dura mater and pia mater. c. between the arachnoid and pia mater. d. between the pia mater and brain. e. between the dura mater and arachnoid.
Genetically modifying human ________ cells may directly affect future generations
A) intestinal B) immune C) gametic D) somatic
Within the transcription bubble, the 9 most recently added nucleotides in the newly synthesized RNA strand temporarily form a helix with the template DNA strand. How might transcription be affected if helix formation did not occur?
A. Rewinding the DNA molecule would be inhibited. B. Unwinding the DNA molecule would be inhibited. C. The position of the 5' end of the RNA would be unstable, inhibiting elongation. D. The position of the 5' end of the RNA would be unstable, stimulating elongation. E. The position of the 3' end of the RNA would be unstable, inhibiting elongation.