REPRODUCTION IN ORGANISMS .PART 5
 POST FERTILISATION  EVENTS.
E vents in sexual reproduction after the formation of zygote(2n)

in external fertilisation zygote formedd in external medium
in  internal fertilisation zygote formed inside the body of female organism.
In ALGAE and FUNGI  zygote Develops a thick wall resistant to dessication and damage 
and undergoes a period of rest before germination.

IN HAPLONTIC  Organisms zygote undergoes meiosis 
  IN DIPLONTIC  organisms zygote underggoes mitosis 

EMBRYOGENESIS  - process of Development of embryo from zygote , by celldivision and cell differentiation

OVIPAROUS    deveopment of zygote outside the body of female parent .(lie eggs )
-after incubation young ones hatch out  eg reptile , birds 
VIVIPAROUS development of zygote inside the female parent 
- after attaining certaiin period of growth young ones are delivered
- get proper embryonic care and protection  o chances of survival more .

in FOWERING PLANTS
ZYGOTE- EMBRYO 
OVULE - SEED
OVARY - FRUIT