考研考试

【单选题】Natural selection is defined as the process ______ the course of evolution by preserving those traits best adapted for an organism’s survival.
A、to which directs
B、of which directs it
C、directs it
D、that directs

网考网参考答案：D
网考网解析：
暂无解析 document.getElementById("warp").style.display="none"; document.getElementById("content").style.display="block"; 查看试题解析出处>>