Re: Why Sexual reproduction is more popular

"Tim Tyler" <seemysig@xxxxxxxxxxxxxx> wrote:
On Jul 2, 12:05=A0am, Adam Skrodzki <adamskrod...@xxxxxxxxx> wrote:

I want to ask why complex animals are usual divided into sexes and are
not intersexual. I know some evolutionary explanation for advantages
of sexual reproduction against asexual, but I've never heard
explanation why sexual reproduction is not made by pairs of
intersexual individuals. I now it is popular among invertebrates why
it disappeard for vertebrates?

I will be appreciate for any help like link to a book where is an
explanation or even name of author ;).

I have a page on that topic:

http://alife.co.uk/essays/gender_division/

Nice essay, Tim. But there are two features of animal hermaphroditism
that you ought to mention and include in the essay.
1. Some hermaphroditic animals require reciprocal coitus. But plants
don't/can't use this strategy. Instead, they broadcast the male pollen.
Why don't plants engage in coitus? My guess is because they don't
have a fixed shape. (Well, also because they are immobile).
2. Other hermaphroditic animals are serial hermaphrodites. But I don't
think that any (presumably perennial) plants are. Note that a serial
hermaphrodite is automatically sexually dimorphic and subject to
both male-combat and female-choice forms of sexual selection. My
own speculation is that serial hermaphroditism is the evolutionary
precursor of dioecious sexuality.

.

Relevant Pages

  • Re: Why Sexual reproduction is more popular
    ... I know some evolutionary explanation for advantages ... of sexual reproduction against asexual, ... own speculation is that serial hermaphroditism is the evolutionary ... precursor of dioecious sexuality. ...
    (sci.bio.evolution)
  • Re: Gradual evolution from sex to asex.
    ... the infamous "two-fold cost of sex". ... transitions from sexuality to asexuality. ...
    (talk.origins)
  • Re: Why sex?: [why did we lose our fur?]
    ... >> That makes a lot of sense once sexual reproduction occurs, but my>> dissatisfaction is about the transition from asexual to sexual>> reproduction. ... I mean, single celled organisms are more likely>to be asexual vs multi-celled organisms which are variously sexual,>including hermaphroditic, heterogonic>, and asexual. ... The correlary between organismal complexity at a cellular leval and sexuality works well for metazoans, but really breaks at the single cell level. ... There are plenty of obligately sexual protists living along side related species that have no apparent sexual phase. ...
    (talk.origins)
  • Re: CTCSS tone generator
    ... sorry that should be TRIOLISM .....Triolism is an uncommon sexual variety. ... the nature of explanation itself in Sexology is ... clarified and much is learned about sexuality in general. ...
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  • Re: CTCSS tone generator
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    (uk.radio.amateur)