问题描述：
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
.
问题解答：
我来补答展开全文阅读