Jonas Salk invented the vaccine for
1). Polio
2). Hepatitis
3). Typhoid
4). Cholera
2. Which blood group is universal acceptor?
3. The hormone that stimulates heart beat is
5. Which one is the largest artery in the human body
6. All of the following are true of neurons except that
7. Alveoli is related to which of the following system of human body?
8. Which of the following blood group is called universal donor ?
9. Question 2:How do ecologists estimate the total number of species present in the world?
10. Which of these statements is true of the kingdom protista?