Post-storm evidence reveals that, beyond intrinsic strength and wind design, a fortified envelope forms
the best line of defense.
The mechanism by which the funiculus forms and attaches to the ovigerous hairs, as well as the process by which the embryonic envelope forms
, have been subjects of controversy for many years.
A common envelope forms, containing both stars in its interior.
If the component's initial masses differ by more than a factor of two--and if the primary fills its Roche lobe after it has developed a helium core but before that core has become degenerate--a common envelope forms and the binary's orbit shrinks until one of two things happens.
At 21[degrees]C, PB1 forms at 30-35 min post-spawning (PS), the hatching envelope forms
at 40-45 min PS, PB2 formation occurs at 50-55 min PS, and first cleavage occurs about 90 min PS (13, 14).