What is $Chlamydomonas$?

Match the following classes of algae with their characteristic colours:
$A.$ Cyanophyceae $a.$ Green colour
$B.$ Chlorophyceae $b.$ Blue-green colour
$C.$ Phaeophyceae $c.$ Red colour
$D.$ Rhodophyceae $d.$ Brown colour

Who is known as the father of modern phycology in India?

Which plants are known as primitive plants?

Agar is obtained from which algae?

Spirogyra differs from moss protonema in having