True-breeding pea plants with inflated, yellow pods were crossed with true-breeding plants with constricted, green pods. The F1 progeny all had inflated, green pods
When the F1 is allowed to self-fertilize, what fraction of the F2 progeny will have constricted, yellow pods?
A. 1/4
B. 3/4
C. 1/16
D. 3/16
E. 9/16
C
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Which of the following statements about malaria is false?
A. Fertilization occurs within a mosquito. B. Merozoites are found inside red blood cells. C. Gametocytes develop from merozoites. D. Sporozoites are only found within a mosquito. E. Gametocytes are passed to a feeding mosquito.
When the energy flow through an ecosystem is measured at each trophic level, ________ of the available energy passes from one level to the next.
A. 1% to 2% B. 5% to 20% C. 25% to 35% D. 36% to 45% E. 46% to 55%
Osmolarity is the ____
a. total solute plus solvent concentration in a solution b. total solvent concentration in a solution c. ratio of solvent to solute in a solution d. total solute concentration in a solution e. ratio of solute to solvent in a solution
A dividing cell lacks a nuclear membrane, contains chromosomes consisting of two chromatids, and has clearly visible chromosomes. It is in which one of the following stages?
A. metaphase B. anaphase C. interphase D. telophase