The process of formation of blood cells is called: MCQ with Answer and Explanation

Explanation:
Elephantiasis, or lymphatic filariasis, is caused by parasitic nematode worms, primarily Wuchereria bancrofti (responsible for about 90% of cases), Wuchereria malayi, and Brugia timori. These worms are transmitted by mosquitoes (like Culex). The adult worms lodge in the lymphatic vessels, causing severe inflammation, blockage, and damage to the lymphatic system. This leads to the accumulation of lymph fluid and massive, disfiguring swelling (edema) of the limbs, genitals, and breasts, resembling an elephant's skin and legs.

Explanation:
Biological Oxygen Demand (BOD) is a measure of the amount of dissolved oxygen required by aerobic microorganisms (mainly bacteria) to decompose the organic matter present in a given volume of water sample at a specific temperature over a specific time (usually 5 days at 20°C). High BOD indicates high levels of organic pollution, which depletes oxygen for aquatic life.

Explanation:
Azadirachta indica is the scientific name of neem, known for its medicinal and insecticidal properties. Ocimum sanctum is holy basil (tulsi), Ficus religiosa is the peepal tree, and Mangifera indica is mango. Neem belongs to the family Meliaceae. Its leaves, seeds, and oil are used in various traditional remedies and biopesticides.