the cockroach egg take about 19,20 or 21 days.
Around a cockroach egg.
3-8 months.
The stages of developement in a cockroach are: Egg - nymph - adult cockroach
The tail of a sperm remains with the head until the sperm goes into the egg to fertilise it.
Don't be silly
Because the sperm will die if it doesn't fertilise the egg. Survival at its basics.
If they hide there, they lay the egg there too.
Oothca.
yes
No, a chicken egg itself does not contain semen. The rooster must fertilise the egg.
sperm
Because it is a mamal