The most common species of honeybee used for commercial apiculture in India is: MCQ with Answer and Explanation

Explanation:
A balanced diet contains all the essential macronutrients (carbohydrates, proteins, fats) and micronutrients (vitamins, minerals) in the correct proportions required for optimal health, growth, and maintenance. Malnutrition is a broad term that refers to deficiencies, excesses, or imbalances in a person's intake of energy and/or nutrients; it includes both undernutrition (wasting, stunting) and overnutrition (overweight, obesity). Water is an essential nutrient, crucial for hydration, transport, and all biochemical reactions. Thus, statements 1 and 3 are correct.

Explanation:
Autotrophs (self-feeders) include photoautotrophs (plants, algae, cyanobacteria) and chemoautotrophs (some bacteria). They produce organic matter from CO₂. Heterotrophs depend on others, saprotrophs decompose dead matter, parasites live on hosts.

Explanation:
Pepsin is a protease secreted by chief cells in the stomach as inactive pepsinogen, activated by HCl. It breaks proteins into peptides. Ptyalin is salivary amylase, trypsin is a pancreatic protease, lipase digests fats.