Ferns often maintain high diversity even on very isolated islands. This is because
A) ferns are often planted deliberately by human colonists.
B) ferns are often introduced accidentally by human colonists.
C) ferns are easily dispersed by light wind-blown spores.
D) ferns are easily dispersed because birds carry their seeds.
E) new fern species most often evolve on isolated islands.

Question

Quizplus · Accepted Answer

Ferns are known to have spores that are easily dispersed by the wind, which allows them to colonize and establish populations even in isolated areas. This could be the reason for the high diversity of ferns on isolated islands. Choices A and B may be possible in some cases but do not apply universally. Choice D is incorrect as ferns do not have seeds. Choice E is also incorrect as ferns are not known to frequently evolve into new species on isolated islands.

Ferns Often Maintain High Diversity Even on Very Isolated Islands