Estradiol is a potent stimulator of vitellogenesis (yolk production) in egg-laying vertebrates. Increasing evidence suggests that many pollutants, for instance those derived from pulp mills, may mimic the actions of estradiol. If one were to place a sexually immature fish in water containing pulp mill effluents, what might you expect would occur?
A. The rate of vitellogenesis would decline.
B. The rate of vitellogenesis would increase.
C. The fish might reach sexual maturity sooner.
D. The rate of vitellogenesis would decline and the fish might reach sexual maturity sooner.
E. The rate of vitellogenesis would increase and the fish might reach sexual maturity sooner.
E. The rate of vitellogenesis would increase and the fish might reach sexual maturity sooner.
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A. papillae B. microvilli C. supporting cells D. axons
In most ferns, roots and leaves sprout from ____
a. fronds b. rhizomes c. sporangia d. sori e. gametophytes
In criminal cases, if 100% of the banding pattern matches a DNA fingerprint, it is
A. unlikely that the suspect was at the scene of the crime and may be the guilty party. B. highly probable that the suspect was at the scene of the crime but unlikely that he/she is the guilty party. C. unlikely that the suspect was at the scene of the crime. D. highly probable that the suspect was at the scene of the crime and may be the guilty party.
Food moves through the digestive system with the aid of ________, special muscular contractions of the food tube.
Fill in the blank(s) with the appropriate word(s).