The correct option is 1, 2 and 4 only.
Explanation
Genetically engineered plants are developed by modifying their genetic material to introduce desirable traits that improve agricultural productivity, nutritional quality, and storage characteristics.
- Statement 1: Correct.
Genetic engineering has been used to develop crop varieties that are more tolerant to environmental stresses such as drought. These modifications help plants survive under limited water availability. - Statement 2: Correct.
Genetic engineering can enhance the nutritional value of crops. For example, biofortified crops are developed to increase the content of vitamins or micronutrients. - Statement 3: Incorrect.
Genetically engineered plants have not been specifically created to grow and carry out photosynthesis in spaceships or space stations as a defined objective of agricultural biotechnology. - Statement 4: Correct.
Genetic modification can increase the shelf life of agricultural produce by slowing down ripening or reducing spoilage, thereby improving storage and transport.
Key Takeaway: Genetically engineered plants are developed to improve traits such as drought tolerance, nutritional enhancement, and longer shelf life of crops.