In the human body, the 'Sinoatrial (SA) node' is located in the wall of the: MCQ with Answer and Explanation

Explanation:
Poultry farming involves rearing birds like chickens for the production of eggs (layers) and meat (broilers). Apiculture (beekeeping) not only produces honey but also significantly increases crop yields through enhanced pollination by bees. Dairy farming focuses on the breeding and rearing of cattle, buffaloes, etc., for milk production, not fish (which is pisciculture). Thus, statements 1 and 2 are correct.

Explanation:
John Gibbon developed the heart-lung machine and performed the first successful open-heart surgery using it in 1953. Barnard did first heart transplant.

Explanation:
Metastasis is the process by which malignant cancer cells detach from the primary tumor, travel through the blood or lymph, and establish secondary tumors in other organs. Benign tumors do not metastasize. Apoptosis is programmed cell death.