Chloroplasts of $Spirogyra$ have

In brown algae,the brown colour is due to the presence of:

Read the following statements and identify the characters related to the alga shown in the diagram:
$(a)$ It is a member of Chlorophyceae
$(b)$ Food is stored in the form of starch
$(c)$ It is a monoecious plant showing oogonium and antheridium
$(d)$ Food is stored in the form of laminarin or mannitol
$(e)$ It shows dominance of pigments chlorophyll $a, c$ and Fucoxanthin.
Choose the correct answer from the options given below:

Kelps are massive

The disease known as "Red rust of tea" is caused by a parasite belonging to which of the following groups?

Brown algae are quite common in