| 41. | The function of producers in an ecosystem is – |
A. conversion of organic compounds to inorganic compounds | |
B. capturing solar energy and converting it into chemical energy | |
C. harness chemical energy | |
D. release energy |
| 42. | The primary or main source of energy in the ecosystem is – |
A. sunlight | |
B. stored sugars in plants | |
C. free heat in fermentation | |
D. heat released during respiration |
| 43. | What is the largest population in an ecosystem? |
A. of primary producers | |
B. of primary consumers | |
C. of secondary consumers | |
D. of decomposers |
| 44. | Erosion of land by the action of wind and water is called- |
A. erosion | |
B. fossil building | |
C. calcification | |
D. salt house |
| 45. | Soil erosion can be stopped by – |
A. over grazing | |
B. by removal of vegetation | |
C. by growing forests | |
D. by increasing bird population |
| 46. | Flood can be prevented by |
A. sloping ground | |
B. removing water cover | |
C. cutting down forests | |
D. by building dams on rivers and planting trees |
| 47. | Where are tidal forests mainly mangroves found? |
A. Nagarjuna Sagar | |
B. Ranganathittu Bird Sanctuary | |
C. Sundarbans Delta | |
D. narmada basin |
| 48. | The main component of mangrove vegetation is – |
A. Rhizophora | |
B. Ficus | |
C. mangifera | |
D. Procipus |
| 49. | The vegetation of the sea shore is called – |
A. salinophilic plants | |
B. acacia plants | |
C. hydrophyte | |
D. desert vegetation |
| 50. | Reduced leaves and sunken stomata are the main symptoms of? |
A. epiphyte | |
B. ascites | |
C. samodbhid | |
D. xerophyte |