The number of thylakoids per granum is one in:

Calcium encrustation and larvicidal properties are present in

$(i)$ Green algae occur in fresh water,brackish water,and salt water.
$(ii)$ Habitat of Brown algae: fresh water (rare),brackish water,and salt water.
$(iii)$ Some red algae are found in fresh water,mostly occur in salt water,and some are in brackish water.
$(iv)$ Most of the red algae are multicellular.
$(v)$ Red algae may occur in both well-lighted regions close to the water surface and also at great depths in oceans where light penetration is little.
$(vi)$ The cell wall of red algae consists of cellulose $+$ agar.
$(vii)$ $2-8$,equal and apical flagella in green algae.

Which type of algae possesses pear-shaped gametes?

Match the following columns:

Column-$I$	Column-$II$
$P$. Chlorophyceae	$I$. $2$, unequal lateral flagella
$Q$. Phaeophyceae	$II$. Flagella absent
$R$. Rhodophyceae	$III$. $2-8$, equal apical flagella

What is the stored food material in algae?