Low sun exposure has been shown to cause vitamin D deficiency, which can result in rickets, or bone deformations. Since the 1930s, milk has been fortified with vitamin D to prevent rickets. You could say that fortifying milk is
A) a biological means of adaptation
B) meant as a way of keeping us out of the sun, high exposure to which can cause skin cancer
C) a cultural means of adaptation
D) a substitute for a mother's milk, which is naturally high in vitamins
E) a copout, since it means getting your vitamin D with your breakfast cereal instead of having to spend time on the beach
Ans: C) a cultural means of adaptation
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The bone age of an individual is defined as:
A. the precise age at which secondary centers of ossification form B. the average chronological age at which centers of ossification form and fusion of growth plates takes place C. a fossil human's age at death as determined by x-raying the bones D. none of these
The primary reason for the success of the Minoan civilization was its
A. control of the eastern Mediterranean. B. innovative weapons. C. larger average body size. D. substantial gold deposits not far from citadels.
Most New World monkeys have a tendency to use an orthograde posture.
Answer the following statement true (T) or false (F)
Two people (BOTH heterozygotes) are able to taste a chemical substance called PTC. The ability to taste PTC is caused by a dominant allele (T). The inability to taste PTC is caused by a recessive allele (t). What proportion of their offspring would be expected to be heterozygous?
a. 3/4 b. 1/2 c. All d. 1/4 e. 2/3