A contraceptive pill contains
a. estrogen.
b. progesterone.
c. follicle-stimulating hormone.
d. luteinizing hormone.
e. both estrogen and progesterone.
Answer: e
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A mammalian female's
a. cells usually have multiple Barr bodies. b. body is a mosaic for the X-linked traits she inherits. c. Barr bodies are active in some cells. d. Barr bodies are produced after puberty. e. X-linked recessive genes are always expressed because of the deactivation of an X chromosome in each cell.
The first step in the healing of a fracture is the formation of ________
Fill in the blank(s) with correct word
Which type of disease condition could be successfully treated by gene therapy?
A) a disease caused by a nonfunctional enzyme in the body B) a disease caused by excess fat intake C) a disease caused by bacterial infection D) a cancer caused by uncontrolled cell division
Which of the following does not belong?
a) phospholipids b) polysaccharides c) waxes d) steroids e) saturated fats f) unsaturated fats