On average, about how often does ovulation occur?
A) every day B) every 6 months C) every 28 days D) every 14 days
Answer: C
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A pure substance that cannot be broken down into another substance is known as a(n) ____
a. proton b. electron c. compound d. element e. isotope
Species A prefers a more dry habitat but grows in a wet habitat. Why might this be?
A) Species B outcompetes A in the dry habitat. B) Species A's fundamental niche is restricted to a wet habitat. C) Species A requires large amounts of moisture to grow. D) Species B prefers a wet habitat.
Which of the following couples would NOT ordinarily be encouraged to seek genetic counseling?
A. Those who plan to raise large families. B. Those with a child who has an inherited disorder or birth defect. C. Those who are first cousins. D. Those who have had babies who died in infancy or before birth. E. Those whose occupations may pose a risk to pregnancy.
What type of subject is treated as closely as possible to an experimental subject except that he or she does not get the experimental treatment?
What will be an ideal response?