Hormones are secreted by:

Blood group of an individual is determined by

Given below are two statements, one is labelled as Assertion (A) and the other as Reason (R). Assertion (A): Voices of men and women are different. Reason (R): Length and thickness of vocal cord is d…

The only vein that carries oxygenated blood is :

Which of the following carries oxygenated blood?

Which of the following statements with reference to 'blood' is/are correct? 1. Blood is composed of plasma and different types of cells. 2. The presence of haemoglobin makes blood appear red.