1.The smallest size of cell which can be seen directly by the eye is ?
2. Dr. Kharana’s work relates to ?
3. Tse-Tse fly is the vector of ?
4. Man has _________ pairs of salivary glands. ?
5. Which one is a water-soluble vitamin ?
6. The metallic part of hemoglobin is ?
7. Hormones are carried from their place of production by ?