Assertion (A): The human heart is myogenic. Reason (R): It beats rhythmically due to signals from the brain. MCQ with Answer and Explanation

Explanation:
The Leghorn (specifically the White Leghorn) is a highly popular and productive breed of chicken originating from Tuscany, Italy. It is primarily reared as a layer breed for commercial egg production due to its high egg yield, early maturity, and efficient feed conversion. It is not typically used for meat production (broilers like Cornish Cross are preferred for that) or as cattle. Rhode Island Red is another dual-purpose breed, but Leghorn is specifically famous for eggs.

Explanation:
Apical meristems at root and shoot tips undergo cell division, causing primary growth (increase in length). Lateral meristems increase girth.

Explanation:
Insectivorous plants (e.g., Venus flytrap) capture insects to obtain nitrogen because they grow in nitrogen-poor soils. So A is true, but R is false (nitrogen-poor, not rich).