Ovules

... Taxaceae have no pollen chamber because they reproduce differently than other conifers. They don't produce woody seed cones. Instead the form ovules at the tips of short axillary shoots. Each ovule is at least partially surrounded by a fleshy, cuplike covering called an aril. In yews, the ...

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... the separation of good genes. This is generally males as sperm are subject to much more selection than eggs. The article gives an example where ovules have more selection and in this species the males have more recombination. http://biology.plosjournals.org/perlserv?request=get-document&doi=10.1371/journal.pbio.0030099

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since tobacco plant being eusporangiate has more than 128 microspores in each anther.....about the number of ovules in ovary of tobacco,see its placentation....

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How many ovules are there in each tobacco plant ovary? Also, how many pollen grains does each anther have? (not an exact number, just roughly) specifically: in a tobacco plant Thanks.

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relationship btw # of pollen grains and the ovules?

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