Among the following, bisexual/hermaphrodite animals are

$\mathrm{I})$ Earthworm

$\mathrm{II})$ Cockroach

$\mathrm{III})$ Sponge

$\mathrm{IV})$ Tapeworm

$\mathrm{V})$ Leech

Chromosome number in meiocyte of $‘\mathrm{A}’$ plant, chromosome number in gamete of $‘\mathrm{B}’$ plant are found in $1:1$ ratio, find out the $\mathrm{A}$ and $\mathrm{B}$ plants.

Identify ploidy of following parts of a flowering plant respectively.

Ovary, anther, egg, pollen, the male gamete, zygote.