$S$ - Statement: Heterotrophic mushrooms are cultivated globally.
$R$ - Reason: $A$ $250 \ kg$ cow produces $200 \ kg$ of protein daily.

Cyanobacteria of great nutritive value is

People recovering from a long illness are advised to include the alga $Spirulina$ in their diet because it:

Which of the following algae is rich in protein?

What is primarily obtained from mushroom food?

Consider the following statements $(I-IV)$ and select the option containing the correct answer.
$I.$ The unicellular $Spirulina$ can produce large quantities of food rich in protein,minerals,and vitamins.
$II.$ Based on body weight,the microorganism $Methylophilus$ $methylotrophus$ can produce much more protein in a day than a cow.
$III.$ Common button mushrooms are a rich source of Vitamin-$C$.
$IV.$ $A$ variety of rice has been developed that is rich in calcium.