Thermal algae are forms which grow and survive:

Spirogyra cells contain

Sex organs of thallophytes are generally

Some characters of algae are given below:
$a.$ Floridean starch
$b.$ Sulphated phycocolloids in cell wall
$c.$ Alginic acid
$d.$ Trumpet hypha
$e.$ Haplodiplontic life cycle
$f.$ Isomorphic alternation of generation
$g.$ Fucoxanthin
$h.$ Phycoerythrin
$i.$ Zygotic meiosis
$j.$ Two anterior flagella
Which of the given set of characters belongs to $Laminaria$?

$(i)$ 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 of the following is incorrect regarding Chara?