1) Spore
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https://www.crosswordclues.com/clue/microspore
the smaller of two kinds of spores produced by a heterosporous plant; compare megaspore.
Found on
http://en.wikipedia.org/wiki/Glossary_of_botanical_terms
Microspores are land plant spores that develop into male gametophytes, whereas megaspores develop into female gametophytes. The male gametophyte gives rise to sperm cells, which are used for fertilization of an egg cell to form a zygote. Microspores are structures that are part of the alternation of generations in many seedless vascular cryptogams...
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http://en.wikipedia.org/wiki/Microspore
a small spore which gives rise to the male gametophyte in heterosporous pteridophytes. Also used by some authors for a pollen grain. cf. megaspore
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http://florabase.dpaw.wa.gov.au/help/glossary
• (n.) One of the exceedingly minute spores found in certain flowerless plants, as Selaginella and Isoetes, which bear two kinds of spores, one very much smaller than the other. Cf. Macrospore.
Found on
http://thinkexist.com/dictionary/meaning/microspore/
(from the article `spore`) ...from the parent plant, but rather they germinate into microscopic gametophyte individuals that are entirely dependent upon the sporophyte plant. ... [7 related articles]
Found on
http://www.britannica.com/eb/a-z/m/86
The smaller type of spore, bearing male gametes.
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http://www.encyclo.co.uk/local/20637
<plant biology> A haploid spore produced by a plant sporophyte that develops into a male gametophyte. In seed plants, it corresponds to the developing pollen grain at the uninucleate stage. The smaller of the spores of a heterosporous species. ... (18 Nov 1997) ...
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http://www.encyclo.co.uk/local/20973
A haploid spore produced by a plant sporophyte that develops into a male gametophyte. In seed plants, it corresponds to the developing pollen grain at the uninucleate stage. The smaller of the spores of a heterosporous species.
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http://www.encyclo.co.uk/visitor-contributions.php
Mi'cro·spore noun [
Micro- +
spore .]
(Botany) One of the exceedingly minute spores found in certain flowerless plants, as
Selaginella and
Isoetes , which bear two kinds of spores, one very much smaller than the other. Confer
Macrospore .
Found on
http://www.encyclo.co.uk/webster/M/63
In plants which are heterosporous, the smaller kind of spore is called a microspore; it usually germinates into a male (sperm-producing) gametophyte. Contrast with megaspore.
Found on
http://www.ucmp.berkeley.edu/glossary/gloss8botany.html
In plants which are heterosporous, the smaller kind of spore is called a microspore; it usually germinates into a male (sperm-producing) gametophyte. Contrast with megaspore.
Found on
http://www.ucmp.berkeley.edu/glossary/glossary_8.html
Haploid cells formed by meiosis in plants; divide by mitosis to form pollen
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https://www.encyclo.co.uk/local/22581
No exact match found.
