If an albino (aa) mates with a person homozygous for normal pigment (AA),
A. there is a 100% probability that the child will have albinism.
B. there is a 50% probability that the child will have albinism.
C. there is a 100% probability that the child will have normal pigmentation.
D. there is a 50% probability that the child will have normal pigmentation.
Answer: C
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This figure shows a lymph node and its components. What structure is indicated by number 4?
A. Lymphatic nodule B. Medullary cord C. Trabecula D. Lymphatic sinusoid E. Hilum
The portion of the nervous system that has voluntary control over skeletal muscles is the ________ division.
A. autonomic motor B. somatic motor C. somatic sensory D. visceral sensory
What provides toughness to the dermis and holds water in this skin layer?
A) Merkel cells B) collagen fibers C) melanocytes D) elastic fibers E) epidermis dendritic cells
Why does muscle activity affect the temperature of the body?
A. Muscle activity directs more warm blood to the muscles away from the central core causing a cooling effect on your internal organs. B. The rate of chemical reactions increases in muscle fibers during contraction, so the rate of heat production also increases. C. Muscle contraction generates pyrogens which reset the body's internal thermostat to a higher temperature. D. Increased muscle activity causes a rise in adipose stores which increases the insulation value of the body.