The animals which lay fertilized or unfertilized eggs and whose development takes place outside the body of the mother are called:

Why are the chances of survival of young ones greater in viviparous organisms?

$A-$ Events after the formation of zygote are called post-fertilization events.
$R -$ In viviparous animals,a young one develops outside the mother's body.

In $P$ type of plants,vegetative,reproductive,and senescent phases are clearly visible,whereas in $Q$ type of plants,it is difficult to clearly define these phases.
$\quad\quad\quad\quad P \quad\quad\quad\quad Q$
$(A)$ Annual $\quad$ Biennial,Perennial
$(B)$ Annual,Biennial $\quad$ Perennial
$(C)$ Perennial $\quad$ Annual,Biennial
$(D)$ Biennial,Perennial $\quad$ Annual

Synchrony between the maturity of sexes and the release of a large number of gametes is shown by:

$A$ clone is two or more individuals which are similar: