The disease caused by the deficiency of vitamin B₁₂ and folate leads to: MCQ with Answer and Explanation

Explanation:
The fovea contains tightly packed cones with photopsins (iodopsins) sensitive to red, green, blue. Rhodopsin is in rods for dim light.

Explanation:
The Green Revolution in India was a period of significant agricultural transformation. Norman Borlaug, the 'father of the Green Revolution' globally, developed high-yielding, disease-resistant dwarf wheat varieties in Mexico. M.S. Swaminathan, known as the 'father of the Green Revolution in India', adapted these varieties to Indian conditions and led the scientific and administrative efforts to introduce these high-yielding varieties (along with improved irrigation and fertilizers) to Indian farmers, drastically increasing wheat and rice production.

Explanation:
Amphibia (e.g., frogs, toads, salamanders) are characterized by their dual habitat (amphi = both, bios = life). They can live in water and on land. They have moist, glandular skin without scales, which aids in respiration. They typically have a larval stage (tadpole) that undergoes metamorphosis to become an adult.