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【单选题】
晶体中点缺陷的存在，使电阻_____。A.
不变
B.
增大
C.
减小
D.
不能确定
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举一反三
【简答题】有丝分裂与减数分裂 (Mitosis／Meiosis)
【简答题】减数分裂(meiosis)
【单选题】Which of the following is unique to mitosis and not a part of meiosis?
A.
homologous chromosomes pair forming bivalents
B.
homologous chromosomes cross over
C.
chromatids are separated during anaphase
D.
homologous chromosomes behave independently
【简答题】During meiosis but not dring mitosis, homologous chromosomes pair up in a process of _________.
【判断题】Bacterial and archaeal cells are functionally simpler in several ways. They lack mitosis and meiosis, and have a different genetic organization.
A.
正确
B.
错误
【单选题】which of the following events occurs during mitosis but not meiosis?
A.
segregation of sister chromatids
B.
pairing of homologous chromosomes
C.
alignment of chromosomes on the metaphase plate
D.
crossing-over between homologous chromosomes
E.
none of the above
【单选题】Mitosis results in ( ) chromosome number while meiosis results in ( ) chromosome number.
A.
a doubling of; no change in
B.
no change in; on change in
C.
a reductionq by half in; no change in
D.
no change in; a reduction by half in
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【简答题】During meiosis but not dring mitosis, homologous chromosomes pair up in a process of _________.
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