Which of the following best reflects the concept of fetal programming?
a. A woman smokes and binge drinks during her pregnancy, and experiences a miscarriage in the first trimester.
b. A woman experiences a hurricane while pregnant, and the child's genes are marked to be highly sensitive to stress.
c. An active fetus creates distress for a woman while pregnant, which leads her to be less attached to child in infancy.
d. A doctor selects the most genetically healthy embryos to implant in a woman's uterus following in vitro fertilization.
Answer: b. A woman experiences a hurricane while pregnant, and the child's genes are marked to be highly sensitive to stress.
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Irradiation of cells with ultraviolet light may cause
A. four nucleotides to covalently bind together. B. thymine dimers. C. adenine complementary base pairing with cytosine. D. the addition of uracil.
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A. prior to cleavage. B. prior to neurulation. C. prior to fertilization. D. after gastrulation. E. after organogenesis.
An orbital describes the ____ of an electron
a. exact location b. exact path c. most frequent locations d. charge e. chemical bonds