A nephridium of an earthworm drains materials directly from the
1). Gut
2). Coelom
3). Lymph
4). Blood
1. Glass is a
3. Mechanical tissues are very poorly developed in
5. Which of the following could be used as fuel in propellant or rockets ?
6. Heat from the sun reaches earth by the process of
7. Which one of the following elements is used in the manufacture of fertilizers?
8. Table salt gets moist during rainy season because
9. The functional respiratory organ of a fully formed tadpole is the