Assertion (A): RNA is usually single-stranded. Reason (R): RNA contains deoxyribose sugar. MCQ with Answer and Explanation

Explanation:
The pons is a prominent bulge in the brainstem, located between the midbrain and the medulla oblongata. It serves as a relay station between different parts of the brain. Crucially, the pons contains the pneumotaxic center and the apneustic center, which are part of the respiratory control network. These centers modulate the activity of the primary respiratory center in the medulla, regulating the rate and depth of breathing. The cardiovascular center is in the medulla, and visual/auditory reflexes are in the midbrain.

Explanation:
Gregor Mendel conducted his classic hybridization experiments on garden pea (Pisum sativum) between 1856 and 1863, establishing the fundamental laws of inheritance. He selected seven contrasting characters.

Explanation:
Progesterone stimulates the development of alveolar tissue of the breasts during pregnancy. Estrogen promotes duct development. Prolactin initiates milk synthesis, oxytocin ejection.