| 1 |
R-3 means. |
- A. Less use
- B. Reuse
- C. Recycle
- D. Refuse
|
| 2 |
Which one of the example of abiotic factor? |
- A. Decomposoer
- B. Light
- C. Water
- D. Soil
|
| 3 |
Conversion of Nitrates into nitrogen gas is called. |
- A. Denitrification
- B. Assimilation
- C. Ammonification
- D. Nitrogen fixtation
|
| 4 |
Ectoparasite is |
- A. Ascaris
- B. Amoeba
- C. Leech
- D. Plasmodium
|
| 5 |
Which of the following is the abiotic component of an ecosystem? |
- A. producers
- B. Herbivores
- C. Carnivorse
- D. Oxygen
|
| 6 |
_________ atom is the principal building block of many kind of biomolecules. |
- A. Oxygen
- B. Carbon
- C. Hydrogen
- D. Nitrogen
|
| 7 |
In an ecosystem the flow of _________ is one way, while _________ is/are constantly recycled. |
- A. Minerals, energy
- B. Energy minerals
- C. Oxygen, Energy
- D. Glucose, water
|
| 8 |
Abiotic component of the ecosystem is: |
- A. Producers
- B. Consumers
- C. Decomposers
- D. Light
|
| 9 |
In ecosystem the role of decomposers is played by |
- A. animals
- B. plants
- C. bacteria and fungi
- D. algae
|
| 10 |
All ecosystems of the world combine to form: |
- A. Community
- B. Population
- C. Biosphere
- D. Competition
|