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Dictionary » A » Alternation

Alternation

Alternation

1. The reciprocal succession of things in time or place; the act of following and being followed by turns; alternate succession, performance, or occurrence; as, the alternation of day and night, cold and heat, summer and winter, hope and fear.

2. (Science: mathematics) permutation.

3. The response of the congregation speaking alternately with the minister. Alternation of generation. See generation.

Origin: L. Alternatio: cf. F. Alternation.


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Alternation of generation

alternation of generations is a stupid term anyway, because they are the same generation. and it does exist everywhere, it's just that in spermatophytes the haploid part of the life cycle is reduced to only a few cells.

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by MrMistery
Sun May 03, 2009 3:12 am
 
Forum: Botany Discussion
Topic: Alternation of generation
Replies: 6
Views: 2306

Alternation of generation

alternation of generation is only in pteridophytes(seedless).Spermatophytes(gymnosperms and angiosperms) don't exibit alternation of generation

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by asker94
Sat May 02, 2009 8:09 am
 
Forum: Botany Discussion
Topic: Alternation of generation
Replies: 6
Views: 2306

Re: alternation of generations in mosses/ferns (haploid/diploid)

kind of.... this site crashed on me for a bit there thanks.

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by Twila
Wed Apr 22, 2009 2:21 pm
 
Forum: Botany Discussion
Topic: alternation of generations in mosses/ferns (haploid/diploid)
Replies: 2
Views: 906

alternation of generations in mosses/ferns (haploid/diploid)

Im being told that gametophyte;haploid is the largest stage in of alternation of generations in mosses, and ferns its sporophyte; diploid, Im pretty thoroughly confused.. I thought they were basicly the same plant because they reproduce through spores and ...

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by Twila
Wed Apr 22, 2009 1:28 pm
 
Forum: Botany Discussion
Topic: alternation of generations in mosses/ferns (haploid/diploid)
Replies: 2
Views: 906

Re:

do you know what alternation of generations means? Yes, I do. I was just confused...

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by sagda
Thu Jan 29, 2009 5:23 pm
 
Forum: Botany Discussion
Topic: Alternation of generation
Replies: 6
Views: 2306
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