When oxytocin is released during childbirth, the hormone targets cells in the
A) kidneys.
B) breasts.
C) hypothalamus.
D) uterus.
E) breasts and uterus.
D
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In ________, cells are mixed with recombinant DNA and exposed to a brief pulse of high-voltage electricity to cause the membrane to become permeable and allow the uptake of DNA from its environment.
Fill in the blank(s) with the appropriate word(s).
Which of the following may occur in meiosis but not in mitosis?
A. DNA replication B. chromosome condensation C. metaphase D. cytokinesis E. crossing-over
Which is an example of an event that would give rise to primary succession?
a. a dense landslide of mountain rocks covering an entire valley b. a fire that burns all surface vegetation c. an abandoned agricultural field d. a lake that dries up, killing all aquatic plants e. a forest that is logged
When the solute concentration of solution A is lower than the solute concentration of solution B, solution A is considered
A. hypertonic. B. isotonic. C. hypotonic.