Which of the following is a trace element essential for human nutrition? MCQ with Answer and Explanation

Explanation:
Necrosis is the premature death of cells or tissue due to injury, ischemia, or infection, often causing inflammation. Atrophy is shrinkage, hypertrophy growth, apoptosis programmed cell death. Infarction leads to coagulative necrosis.

Explanation:
The Murrah is a premier indigenous breed of water buffalo in India, renowned for its high milk yield and fat content. The White Leghorn is an exotic breed of chicken highly valued in the poultry industry for its excellent egg-laying capacity. Apiculture is the rearing and management of honeybees for honey and wax; fish farming is called pisciculture or aquaculture. Thus, statements 1 and 2 are correct.

Explanation:
Alveoli are tiny, thin-walled air sacs surrounded by a network of pulmonary capillaries. Oxygen diffuses from alveolar air into blood, and CO₂ diffuses from blood into alveolar air. Bronchi and bronchioles are air passages, trachea is the windpipe. The large surface area of alveoli (about 70 m²) facilitates efficient gas exchange.