The thin flap of tissue that covers the opening of the vagina is called the hymen
Indicate whether the statement is true or false.
T
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Cap
A. is involved in positive control. B. stands for cyclic amp protein. C. works in conjunction with cAMP. D. is involved in negative control. E. is involved in positive control AND works in conjunction with cAMP.
Solar radiation that falls on high latitudes ____
a. passes through about the same amount of atmosphere as that which falls at low latitudes b. passes through less atmosphere than that which falls at low latitudes c. passes through more atmosphere than that which falls near low latitudes d. is spread out over less area than that which falls near low latitudes e. covers about the same area as that which falls near low latitudes
__________ shifts the range of variation in traits in one direction Fill in the blank(s) with the appropriate word(s)
Trisomy 21, or Down syndrome, occurs when there is a normal diploid chromosomal complement but one (extra) chromosome 21. Although fertility is reduced in both sexes, females have higher fertility rates than males. Van Dyke et al
(1995; Down Syndrome Research and Practice 3[2]:65—69 ) summarize data involving children born of Down syndrome individuals. Assume that children are born to a female with Down syndrome and a normal 46-chromosome male. What proportion of the offspring would be expected to have Down syndrome? A) Two-thirds of the offspring would be expected to have Down syndrome. B) One-third of the offspring would be expected to have Down syndrome. C) All the children would be expected to have Down syndrome. D) None of the offspring would be expected to have Down syndrome. E) One-half of the offspring would be expected to have Down syndrome.