In genetics, the 'Operon model' was proposed by: MCQ with Answer and Explanation

Explanation:
Antidiuretic Hormone (ADH), or vasopressin, is released from the posterior pituitary in response to high blood osmolarity (dehydration) or low blood volume. Its primary action is on the kidneys, specifically the late distal convoluted tubules and the collecting ducts. ADH binds to V2 receptors on the basolateral membrane of the principal cells, triggering the insertion of aquaporin-2 water channels into the apical membrane. This makes the tubule highly permeable to water, increasing water reabsorption from the filtrate back into the blood, producing concentrated urine and conserving body water.

Explanation:
Collenchyma is a simple permanent tissue with living cells, unevenly thickened primary cell walls (cellulose and pectin), providing mechanical support and flexibility, especially in young stems and leaf petioles. Parenchyma is for storage and metabolism, sclerenchyma is dead, rigid with lignified walls, xylem conducts water.

Explanation:
Tuberculosis (TB) is a bacterial infection caused by Mycobacterium tuberculosis, typically affecting the lungs. It is spread through airborne droplets. S. pneumoniae causes pneumonia, S. typhi typhoid, P. vivax malaria. TB is treated with a multi-drug regimen including isoniazid and rifampicin.