Official 6 Lec 2
Question 4 of 6
According to the professor, what are two factors that prevent Nightcap Oak population from spreading?

A.

The complex conditions required for the trees to produce fruit

B.

The fact that the seed cannot germinate while locked inside the shell

C.

The limited time the seed retain the ability to germinate

D.

Competition with tree species that evolved more recently

正确答案:BC

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