For the following questions answer them individually
Which kind of therapy wasgiven in 1990 toa four-year-old girl with adenosine deaminase (ADA) deficiency?
How many hot spots of biodiversity in the world have been identified till date by Norman Myers?
If '+' sign is assigned to beneficial interaction, '-' sign to detrimental and '0' sign to neutral interaction, then the population interaction represented by '+' '-' refers to