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Index of Subjects Dave, Thank you for the reply. I was reading Lichens of North America when I got confused about seeds versus spore. I did not make clear I wanted a text that explained seeds and spore. My difficulty is that a definiton such as yours, similar to those I found elsewhere, is equivocal. I'm an amateur at this. The definitions I found led me to conclude some seeds are spores and some spores are seeds, and some seeds are not spores and some spores are not seeds. That is, seed vs. spore is not a dichotomy. -- Gerald On 6/2/14, 20:25, David & Alison Webster wrote: > Hi Gerald & All, June 2, 2014 > Mainly a seed (at least a typical seed) is a multicellular non motile > product of sexual reproduction and has differentiated structures such as > cotyledons, plumule and radicle whereas spores can be single-celled or > multicellular, the haploid sometimes motile participants of sexual > union, or diploid cells or clusters of cells that are generated > following this union or asexual diploid cells that are just shed under > some conditions like a specialized single-celled botanical dandruff. > Many 'primitive' organisms are able to generate resting spores, when > conditions become adverse, so they can survive otherwise lethal conditions. > The above are distinct from the various multicellular diploid > packages for vegetative propagation that are split off from lichens, > mosses, liverworts and some vascular plants. > > Brodo, Sharnoff and Sharnoff (Lichens of North America) is a recent > book with good illustrations but difficult to use because species are > arranged in alphabetical order so closely related genera, that might > readily be confused, are scattered. > Yt, Dave Webster, Kentville > > ----- Original Message ----- From: "Gerald" <naturens@zdoit.airpost.net> > To: <naturens@chebucto.ns.ca> > Sent: Monday, June 02, 2014 6:41 PM > Subject: [NatureNS] Spores vs. seeds > > >> Hi, >> >> I am learning about lichens. I am starting with spores (decided they >> came first). I am trying to understand the difference between a seed and >> a spore. I'm not even sure there is a difference. Answers or a good text >> suggestion welcome. >> >> Thanks >> >> -- >> Gerald >> >> >> ----- >> No virus found in this message. >> Checked by AVG - www.avg.com >> Version: 2014.0.4592 / Virus Database: 3950/7580 - Release Date: 05/28/14 >> >
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