1.The persistence of bacteria throughout evolutionary time is due to their genetic homogeneity (i.e.,sameness).2.They divide by binary fission,without mitosis or meiosis.3.Genetic variation in bacteria is not known to occur,nor should it occur,becaus

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1.The persistence of bacteria throughout evolutionary time is due to their genetic homogeneity (i.e.,sameness).2.They divide by binary fission,without mitosis or meiosis.3.Genetic variation in bacteria is not known to occur,nor should it occur,becaus
1、persistence (n.)持续;持久
bacteria (n.) pl.of bacterium 细菌
evolutionary (a.) 发展的,进化的,渐进的
homogeneity (n.) 同种;同质
这句话大意是：
细菌在整个进化过程中的持续性取决于它们的基因性.
（我也不知道这句话什么意思,只能给你翻译了.）
2、binary 二元的,由二部分构成的
fission 分裂
mitosis 有丝分裂
meiosis 减数分裂
它们直接分裂成两部分,不需要有丝分裂或减数分裂.
（这不是最简单的细胞分裂方式,即无丝分裂么）
3、asexual 无性的
因为细菌是无性生殖,所以细菌中的基因突变是不可知的,理论上不应该发生的.
4、Bacterial (a.)细菌的,细菌引起的
conjugate (vt.)使结合,使成对(vi.)结合(a.)结合的
mutually (ad.)互相,彼此
菌类细胞成对结合在一起彼此交换它们的基因物质（核酸）.
5、它们的基因物质都包含在（细胞核的）核膜中.
（如果这句话和上面几句有上下文联系,这句话应翻译为：）
（他们的基因物质都包含在拟核区域中.）

4，第一个说的是同质性是进化原因，错，第二个说原核生物不进行有丝和减数分裂，错，3说细菌不突变，错，5说原核的基因组都在核中，更错。

1 细菌在进化过程中之所以能存在是因为同质性
2 细菌以二分裂的方式繁殖,没有有丝分裂和减数分裂
3 细菌的基因突变没有形成,也不应该形成,原因在于他们进行无性生殖
4 细菌细胞结合来交换彼此的遗传物质
5 细菌的遗传物质存在于特定的核区域内
1错...同质性不是进化的原因哦
2错..细菌虽然说一般情况下进行二分裂生殖,但是已经有研究证实,细菌存在有...

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下列叙述有关原核生物是正确的？
1 .遗传的同质性是细菌持续进化的原因。
2.他们主要进行二分裂，而不进行有丝分裂或减数分裂。
3.细菌的基因变异至今没有发现，或者根本没有发生，因为他们采用无性繁殖方式。
4.细菌通过结合完成遗传物质的交换与突变。
5.他们的遗传物质都在核膜中。
...

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下列叙述有关原核生物是正确的？
1 .遗传的同质性是细菌持续进化的原因。
2.他们主要进行二分裂，而不进行有丝分裂或减数分裂。
3.细菌的基因变异至今没有发现，或者根本没有发生，因为他们采用无性繁殖方式。
4.细菌通过结合完成遗传物质的交换与突变。
5.他们的遗传物质都在核膜中。
4是对的吧

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