In sunflower, the arrangement of leaves on the stem is: MCQ with Answer and Explanation

Explanation:
Vasoactive Intestinal Peptide (VIP) is a 28-amino acid neuropeptide that acts as a neurotransmitter and a hormone. In the gastrointestinal tract, its primary functions are stimulatory and relaxant: it stimulates the secretion of water and electrolytes into the intestinal lumen (acting as a secretagogue), relaxes the smooth muscle of the gut (including the lower esophageal sphincter, stomach, and gall bladder), and stimulates the pancreas to secrete a bicarbonate-rich juice. It also causes vasodilation in the gut. Excessive VIP secretion can lead to severe watery diarrhea (as in VIPoma).

Explanation:
Phagocytosis is receptor-mediated or non-specific engulfment of large particles, forming a phagosome that fuses with lysosomes. Key in immune defense.

Explanation:
Mangifera indica is the scientific name of mango. Musa paradisiaca is banana, Citrus sinensis is orange, Ficus benghalensis is banyan tree. The genus Mangifera refers to mango, 'indica' indicates its origin in India. It belongs to the family Anacardiaceae. Mango is the national fruit of India. Scientific naming follows binomial nomenclature, with genus and species epithet.