Almost All Cacti Are Native to the Americas, but There

Almost all cacti are native to the Americas, but there is a small, relatively uncommon group of plants closely related to cacti native to tropical western Africa. How can we explain this given the information in this chapter?

A) The plants might have floated across the Atlantic.
B) This might have been caused by divergent evolution.
C) The continents were once connected.
D) All of the above are true.

Correct Answer:

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