Consider the following four statements $(A-D)$ and select the option which includes all the correct ones only.
$(A)$ Single cell Spirulina can produce large quantities of food rich in protein, minerals, vitamins, etc.
$(B)$ Body weightwise the microorganism Methylophilus methylotrophus may be able to produce several times more proteins than the cows per day.
$(C)$ Common button mushrooms are a very rich source of vitamin $C$.
$(D)$ A rice variety has been developed which is very rich in calcium.
Statements $(C)$ and $(D)$
Statements $(A), (C)$ and $(D)$
Statement $(B), (C)$ and $(D)$
Statement $ (A)$ and $(B)$
Disadvantages of chemical agents are
$I.$ chemicals are toxic and harmful to human beings and animals
$II.$ chemicals pollute the environment and plants
$III.$ weedicides used to remove weeds also pollute the soil
Choose the correct option
Sporeine kills insects by inhibiting ion transport in the
The scientific name of zebu (Cattle) is
Nitrogen fixation in root nodules of Alnus is brought about by
Leghaemoglobin takes part in