A derived trait is
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A derived trait is
.
A.a trait that arose for a specific purpose
B.a trait that has no apparent purpose,such as the coccyx in humans
C.a trait that is shared by the members of a clade
D.a trait that is found in all members of a kingdom
The evolution of antibiotic-resistant bacteria is an example of
.
A.microevolution
B.macroevolution
C.coevolution
D.adaptive radiation
.
.
A.a trait that arose for a specific purpose
B.a trait that has no apparent purpose,such as the coccyx in humans
C.a trait that is shared by the members of a clade
D.a trait that is found in all members of a kingdom
The evolution of antibiotic-resistant bacteria is an example of
.
A.microevolution
B.macroevolution
C.coevolution
D.adaptive radiation
.
1,衍生的特点是(B)
A对某一特定的目的产生的.
B没有明显的目的,例如在人类的尾骨.
C一个分支的成员共同特征.
D所有成员的特点.
2,抗生素耐药细菌的发展是一个例子.(A)
A微进化.
B突进化
C协同进化.
D适应辐射.
微进化又称种内进化(microevolution),是由突变,遗传漂变,基因流和自然选择导致的等位基因频率的改变.抗药性属于药物筛选,也是一种选择,所以本题应该是微进化.
协同进化 是 生态关系密切的生物,相互选择适应而共同进化的过程.至少是两个物种的.细菌这个肯定不是C.
所以第二题应该是A
A对某一特定的目的产生的.
B没有明显的目的,例如在人类的尾骨.
C一个分支的成员共同特征.
D所有成员的特点.
2,抗生素耐药细菌的发展是一个例子.(A)
A微进化.
B突进化
C协同进化.
D适应辐射.
微进化又称种内进化(microevolution),是由突变,遗传漂变,基因流和自然选择导致的等位基因频率的改变.抗药性属于药物筛选,也是一种选择,所以本题应该是微进化.
协同进化 是 生态关系密切的生物,相互选择适应而共同进化的过程.至少是两个物种的.细菌这个肯定不是C.
所以第二题应该是A
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