You observe a pine with two distinctly different types of cones. The best explanation for this is
A) the tree was produced by grafting.
B) a mutation has occurred in this plant.
C) one cone is the male reproductive structure and the other is the female reproductive structure.
D) one cone is a gametophyte and the other is a sporophyte.
Correct Answer:
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D)
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B)
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A)
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