The process by which plants lose water in the form of vapour mainly through stomata is: MCQ with Answer and Explanation

Explanation:
Vitamin A (retinal) combines with opsin to form rhodopsin, the visual pigment in rod cells for dim-light vision. Deficiency causes night blindness.

Explanation:
Southern blotting involves separation of DNA fragments by gel electrophoresis, transfer to a membrane, and hybridization with a labeled probe. PCR amplifies DNA, ELISA detects proteins, flow cytometry analyzes cells.

Explanation:
Innate immunity is the non-specific, inborn defense mechanism present from birth, providing immediate but general protection against pathogens. Acquired (adaptive) immunity is highly specific, targeting particular antigens and developing memory. The secondary immune response, occurring upon re-exposure to the same antigen, is much faster, stronger, and more prolonged than the primary response due to the presence of memory cells. Thus, statements 1 and 2 are correct.