Identify the haploid and diploid structures from the following:
$I$ - Zoospore,$II$ - Zygote,$III$ - Egg cell,$IV$ - Gametophyte,$V$ - Sporophyte
Haploid structures $\quad\quad$ Diploid structures

What would be the number of chromosomes in the meiocyte and gamete of an onion, respectively?

Oestrus cycle is cyclic changes in the activities of ovaries and accessory duct during

Which is not a bisexual animal?

Is there any relationship between the size of an organism and its lifespan? Give two examples to support your answer.

Study the following statements and choose the correct option.
$I$. Life spans of organisms are correlated with sizes.
$II$. Death of all individuals is certain.
$III$. The organism's habitat,internal physiology,etc.,are collectively responsible for how it reproduces.
$IV$. When offspring is produced by a single parent with or without the involvement of gamete formation,it is called asexual reproduction.