Identify the algae shown in the given figure.

Which of the following algae is most likely to be found in the deepest waters of the ocean?

Number of flagella present in the gametes of $Ulothrix$ is

Give differences: Brown Algae (Phaeophyceae) and Red Algae (Rhodophyceae).

Statement $S$: Fungi are known as primitive plants. Statement $R$: Professor Iyengar is known as the father of modern phycology in India.

$(i)$ 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.