A biologist counted 2,500 cells from an embryo on a microscope slide and recorded the following data.
Stage Number of Cells
Prophase 125
Metaphase 50
Anaphase 50
Telophase 25
Interphase 2,250
Total 2,500
(A) the duration of anaphase is approximately one-half that of telophase
(B) prophase is approximately three times as long as telophase
(C) metaphase is the shortest stage of the cell cycle
(D) interphase is the longest stage of the cell cycle
(E) the chromosomes can first be .seen in prophase
Answer: D
Stage Number of Cells
Prophase 125
Metaphase 50
Anaphase 50
Telophase 25
Interphase 2,250
Total 2,500
If these cells had been dividing randomly, it could be reasonably concluded that
(A) the duration of anaphase is approximately one-half that of telophase
(B) prophase is approximately three times as long as telophase
(C) metaphase is the shortest stage of the cell cycle
(D) interphase is the longest stage of the cell cycle
(E) the chromosomes can first be .seen in prophase
Answer: D
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