____ is the process where new genes evolve from duplicates of old ones
Fill in the blank with the appropriate word.
Duplication and divergence
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Agarose gel electrophoresis separates nucleic acid fragments according to
A. density. B. shape. C. size. D. sequence.
When plants are produced by cloning, which process is most directly involved?
a. mitotic cell division b. binary fission c. meiotic cell division d. gamete production e. budding
How are immune cells able to detect foreign pathogens?
A) They detect foreign, unfamiliar chemical substances released by the invading cells. B) They are able to detect structures on the surfaces of foreign cells that are not found in the host. C) They can compare the DNA sequences from the foreign cells to host DNA.
We know the detailed molecular structure and mechanism of action of the transmembrane protein bacteriorhodopsin. This protein uses sunlight as the source of energy to pump ______ out of the cell
(a) ATP (b) H+ (c) K+ (d) Na+