The process of obtaining a large number of identical copies of a gene or organism is: MCQ with Answer and Explanation

Explanation:
The retina is the inner lining of the eye containing rods and cones, the photoreceptor cells for vision. The cochlea is a spiral-shaped cavity in the inner ear containing the organ of Corti, essential for converting sound vibrations into nerve impulses. Taste buds are primarily on the tongue but are also found on the soft palate, epiglottis, and upper esophagus. Thus, statements 1 and 2 are correct.

Explanation:
Oxytocin, released from the posterior pituitary, causes contraction of myoepithelial cells in mammary alveoli, forcing milk into ducts (let-down reflex). Prolactin stimulates milk synthesis.

Explanation:
Zinc is a micronutrient (trace mineral) required in small amounts for enzyme function, immune response, and wound healing. Sodium, potassium, and phosphorus are macrominerals.