In all the methods of asexual reproduction,

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

Which of the following statements support the view that elaborate sexual reproductive processes appeared much later in organic evolution?
$I.$ Lower groups of organisms have complex body design
$II.$ Asexual reproduction is common in lower groups
$III.$ Asexual reproduction is common in higher groups of organisms
$IV.$ High incidences of sexual reproduction are visible in angiosperms and vertebrates

In which of the following is external fertilization observed?

Clones are defined as ......

New organisms produced through reproduction .......