The alga rich in protein is

$(A)$ The shift from grain to meat diets creates more demands for cereals. Why?
$(B)$ $A$ $250 \ kg$ cow produces $200 \ g$ of protein per day, but $250 \ g$ of $Methylophilus \ methylotrophus$ can produce $25 \ \text{tonnes}$ of protein. Name this emerging area of research. Explain its benefits.

Which of the following microorganisms is $NOT$ used in the production of Single Cell Protein $(SCP)$?

Torulopsis utilis is

Given below are two statements with respect to single cell protein.
Statement $I$: Single cell protein refers to the crude,or refined edible protein,extracted from pure microbial cultures or from dead or dried cell biomass.
Statement $II$: $SCP$ can be readily used as fodder for achieving fattening of calves,pigs,in breeding fish and in poultry.
In the light of the above statements,choose the correct answer from the options given below.

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