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Q. How many cellular nuclei does the pollen tube of angiosperms have? What is ploidy of each of these nuclei?
The pollen tube explicitly the mature male gametophyte of angiosperms has three cellular nuclei: one tube cell nucleus and two sperm nuclei.
All those nuclei are the part of the male gametophyte of the plant and thus each of them is haploid (n).
Polarity in Regeneration A distinct polarity or gradient exists in planarians (and in other animals). The meaning of this is that in any piece or segment of the body; its ant
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