What are genetically modified organisms? How are GM plants useful?

Explanation

Plants, bacteria, fungi and animals whose genes have been altered by manipulation are called genetically modified organisms(GMO).
GM plants are useful in many ways.
(a) GM crops are more tolerant to abiotic stresses (Cold, drought, salt, heat)
(b) Reduced reliance on chemical pesticides (Pest resistant crops)
(c) Help to reduce post harvest losses
(d) Increased efficiency of mineral usage by plants (this prevents early exhaustion of soil fertility)
(e) Enhanced utritional value of food eg :- Vitamin "A" enriched rice.