The disease caused by the bacterium Treponema pallidum is: MCQ with Answer and Explanation

Explanation:
The Green Revolution (1960s-70s) involved adopting high-yielding varieties (HYVs) of wheat and rice, along with chemical fertilizers, pesticides, and irrigation, leading to dramatic increases in food grain production in India. Norman Borlaug was instrumental. GM crops came later. Organic farming is traditional and low-input.

Explanation:
Mature human RBCs have a lifespan of approximately 120 days, after which they are phagocytosed by macrophages in the spleen, liver, and bone marrow.

Explanation:
The epiglottis is a cartilage flap that covers the glottis (laryngeal opening) during swallowing, directing food into the esophagus and protecting the airway. The tongue manipulates food, the uvula prevents nasal regurgitation.