One who has the ‘A’ Blood group can receive blood

Any purchaser/person can send their sample to food analyst for getting analyzed provided that 

Which type of mutation is least likely to affect the phenotype of a plant, as it does not change the amino acid sequence?

According to Lindeman’s law how much energy is lost while transfer from one to next trophic level ?

Which one of the following plant nutrients helps in the synthesis of auxins?

The planting of sugarcane by trench method ______ 

Which country is leading in sugarcane production?

Acetic acid can be used as

A situation when the rainfall deficiency is 25% or more of long term average, it is classified as

which vitamin  deficiency results in a condition known as 'crazy chick disease' or encephalomalacia (softening of the brain)?

The toxin produced by Clostridium botulinum is a/an: