In an XX embryo, ____ inactivation of one X chromosome usually occurs when the embryo has about 32 cells
a. phenotypic
b. inhibited
c. cascading
d. selective
e. random
e
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A scientist is studying a population of feral cats in his city. After ten years, he notes that—for the population of feral cats he is studying—(K–N)/K = 0
Based on this information, what can he deduce about the logistic growth curve for the population at this point in time (recall Figure 46.5)? A. The curve resembles an exponential growth curve. B. The curve is at its inflection point (i.e., the rate of growth has started to slow). C. The curve has plateaued at K. D. The curve is at its steepest point.
The fusion of a sperm and an egg is called _____________
Fill in the blank(s) with the appropriate word(s)
In the Citrate Agar, the agar turns blue when
A. The pH is increased B. The pH is decreased C. The pH did not change D. The pH is irrelevant
During the follicular phase of the female menstrual cycle, estrogen is produced by the
A. follicle cells. B. anterior pituitary. C. developing zygote. D. uterus.