A high level of which hormone increases the chances of having fraternal twins?
a. estrogen
b. progesterone
c. LH
d. hCG
e. FSH
E
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Which of the following lines of evidence would best support your assertion that a particular plant is an angiosperm?
A) It produces seeds. B) It retains its fertilized egg within its archaegonium. C) It lacks gametangia. D) It undergoes alternation of generations. E) It produces gametes by mitosis rather than meiosis.
Intrinsically unstructured proteins:
A. have no function because they are unstructured. B. only function in membranes. C. are capable of binding to several different sites on different partners. D. are more common in bacteria than in humans. E. are only observed in diseased cells.
Which of the following phrases INCORRECTLY finishes this statement? A genetic disease that causes death in infancy and has an autosomal recessive inheritance pattern can persist in a population because
A. it can be passed on to the next generation by a heterozygous carrier. B. the deleterious effects of the disease may not occur until after reproductive age. C. if both parents are carriers, they have a 50% chance of having normal children. D. only homozygotes for the abnormal allele will have the disease. E. individuals with one abnormal allele do not show symptoms of the disease.
Evaporation of water is a phase of water from
A. a liquid into a vapor. B. a solid into a vapor. C. a vapor into a liquid. D. a vapor into a solid. E. All of the answer choices are correct.