In which of the following living organisms does spore formation take place?

Give two examples each of the following:
$(a)$ Plants having unisexual flowers
$(b)$ Agents of pollination
$(c)$ Physical changes on puberty that are common to both boys and girls.

Which method of asexual reproduction occurs in $Amoeba$?

Name the type of asexual reproduction in:
$(a)$ Planaria
$(b)$ Rhizopus
$(c)$ Spirogyra
$(d)$ Hydra

Give two differences between a male and a female gamete.

$(a)$ Identify the organisms $A$ and $B$ and the mode of asexual reproduction exhibited by them.
$(b)$ How will an organism be benefitted if it reproduces through spores?
$(c)$ Mention the two asexual methods by which Hydra can reproduce. Explain briefly any one such method.