That appear before the trees leaves are out in the spring, Ask an Expert

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That appear before the tree's leaves are out in the spring; and they are dioecious. What does that indicate about these trees?

a.Their pollen is dispersed by wind.
b.Flower color or shape is not related to pollinators.
c.Their insect pollinators are probably color blind.
d.Early spring birds are probably the pollinators.

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Category:- Biology
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