The Fundamentals AND evolution of SEX (dimorphic sexuality)

()3.5 bill = life ('pond scum' from nitrogen globules naturally slush-balling)

movement, preds, 'senses';
cell absorbing, coalition symbiosis

(prokaryotes then eukaryotes (nucleus [cell] in a cell))

key concept: 'parallelism'

.asex (self split) [most mass]
[sperm and egg forms from earlier chain reactions]
.sex (reproduct-chemical sharing symbiosis) --
-- hermaphrodite (boy AND girl in one) [incl reversion to 'asex' (self fertilize; "Autogamy")]
-- dimorphic (boy/sperm OR girl/egg specializing)

()<1 bill = animals (multicell preds):
sponges, coral
(from hermaphro pond-scum)

jellyfish, worms, (*multicell-moving-pred* hermaphrodites)
[note occas "Autogamy" (self fertilize)]

[[
external fertilizing
internal copulation
]]

()500 mill [i.e half a billion, you congenital morons] =
dimsex (develops thru parallelism) -- "penis fencing"
flatworms, mollusks, arthros, verts

*emasculation attacks by bigger older hermaphrodite*; note egg is BIG

1st Selection plane /bottleneck ("1st imperative") = SURVIVE [enviro, food (e.g pred/prey), disease]
2nd Selection plane /bottleneck ("2nd imperative") = REPRODUCE (convert food)

(Cambrian Explos = multicell moving predator DIMSEX [...male 2nd plane competition])

.tournament (direct male purge)
.display (indirect male purge)

~environment induced gender ('stress', heat, food access) [male is older]
~chromosome induced gender ["scaffolding," a`la snake venom]

(Verts = fish, amphib, reptiles[300m], birds[250m], mammals[200m])

adult male as hyper-flowered hermaphrodite; female as stunted juvenile bud (can finish maturing)

"internal reproduction as type of parasite attack"

..........
societal caste structure vets knowledge

evidence at nature magS

....
notes of interest...

flatworms (penis fencing)
sea slugs (stunting /emasculation attacks)
hagfish (maturity TO male)
lampreys ("sham" mating)
seahorse
clownfish
hyenas
barnacles
bedbugs
spiders