| 1 |
The thickness of biosphere is: |
- A. 02 km
- B. 20 km
- C. 50 km
- D. 200 km
|
| 2 |
At the end of a long food chian the energy will be. |
- A. Will more
- B. As same as at start
- C. Will less
- D. Zero
|
| 3 |
The only source of energy for all ecosystems of the world is. |
- A. Sun
- B. Moon
- C. Plants
- D. Ocean
|
| 4 |
It is an example of primary consumers: |
- A. Cattles
- B. Snake
- C. Lion
- D. Frog
|
| 5 |
Endoparasite is: |
- A. Leech
- B. Lices
- C. Ascaris
- D. Mosqitto
|
| 6 |
R-2 means. |
- A. Reduce
- B. Recycle
- C. Renewable
- D. Reuse
|
| 7 |
The materials flow from one trophic level to the next by means of: |
- A. Food chains
- B. Food web
- C. Both a & b
- D. None of these
|
| 8 |
250 years age, the population of world was approximately ------------ million. |
- A. 400
- B. 500
- C. 600
- D. 700
|
| 9 |
The type of symbiotic relationship in which one member get benefit and other is harmed is called. |
- A. Parasitism
- B. Mutualism
- C. Commensalism
- D. Predation
|
| 10 |
An epiphyte is an example of: |
- A. Parasitism
- B. Mutualism
- C. Commensalism
- D. Symbiosis
|