1.Which of the following milestones happened first?A.Multicellular organisms arose.B.Some organisms developed an aerobic form of metabolism.C.The DNA in most cells became enclosed in a nucleus.D.Photosynthesis evolved.2.A population is divided into t

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1.Which of the following milestones happened first?A.Multicellular organisms arose.B.Some organisms developed an aerobic form of metabolism.C.The DNA in most cells became enclosed in a nucleus.D.Photosynthesis evolved.2.A population is divided into t
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1.Which of the following milestones happened first?A.Multicellular organisms arose.B.Some organisms developed an aerobic form of metabolism.C.The DNA in most cells became enclosed in a nucleus.D.Photosynthesis evolved.2.A population is divided into t
1.Which of the following milestones happened first?
A.Multicellular organisms arose.
B.Some organisms developed an aerobic form of metabolism.
C.The DNA in most cells became enclosed in a nucleus.
D.Photosynthesis evolved.
2.A population is divided into two subpopulations by a glacier.After many generations of reproductive isolation,the glacier melts and the two groups encounter one another.Having evolved separately in differing environments,the two groups are now considered to be of a different __________ because they can no longer interbreed and produce fertile offspring.
A.kingdom
B.subspecies
C.species
D.genus
3.Which of the following are associated with the burning of gasoline and diesel fuel in automobiles and trucks?
A.production of acid precipitation
B.production of smog
C.production of greenhouse gases which contribute to global warming
D.all of these

1.Which of the following milestones happened first?A.Multicellular organisms arose.B.Some organisms developed an aerobic form of metabolism.C.The DNA in most cells became enclosed in a nucleus.D.Photosynthesis evolved.2.A population is divided into t
d
a
d
1.这首先发生了以下里程碑?
多细胞生物出现.
b .某些生物开发了一个有氧代谢的形式.
c DNA在大多数细胞成为封闭在一个核.
d .光合作用进化而来的.
2.人口由冰川分为两个亚种群.经过许多代人的生殖隔离,冰川融化和两组遇到彼此.分别在不同的环境中进化后,两组现在被认为是不同的跨越,因为他们再也不能交配,产生的后代.
答:国
b .亚种
c .物种
d .属
3.下列哪与燃烧的汽油和柴油汽车和卡车?
答:生产酸性降水
b .生产的烟雾
c .生产的温室气体,导致全球变暖
d .所有这些
这是翻译

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