Question at position 21 What is mitosis?the division of the cytoplasmthe production of gametesthe division of the genetic material in the nucleuscopying the genetic materialexpression of the genetic material单项选择题

A

the division of the cytoplasm

B

the production of gametes

C

the division of the genetic material in the nucleus

D

copying the genetic material

E

expression of the genetic material

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Also known as regular cellular division, it is how cells divide into two identical daughter cells during growth, or repair of injuries.     

Question at position 10 The end result of mitosis and cytokinesis is two cells, each with half the number of chromosomes as the mother cell.two cells identical in size and genetic material.three cells, one of which is twice the size of the other two.two cells identical in genetic material, but one is smaller than the other.two cells, each with twice the number of chromosomes as the mother cell.Clear my selection

Question at position 5 Scientists discovered a new drug, which they called Vuptuene. When tested in cells, they found that Vuptuene killed cells that were dividing rapidly but had no effect on cells that were not actively dividing. The scientists concluded that Vuptuene might make an effective chemotherapy drug for cancer treatments. Why did the scientists think Vuptuene might be effective at treating cancer?Unlike radiation therapy, the drug would target a specific population of cells.Cancer cells divide more rapidly than most normal cells.The drug would only target cancer cells.Cancer cells are the only cells dividing in a mature human.The drug would not affect normal cells.Clear my selection

Mitosis

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