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प्रश्न
If frog population in paddy fields declines all of a sudden,
a) What will be the effect on paddy crop?
b) Number of which consumers will decline and which will increase?
c) Name the Indian states where paddy is cultivated on a large scale.
उत्तर
a) The paddy crop will reduced.
b) The number of snakes (Tertiary Consumers) will decrease and the number of pests, insects (Primary Consumers) will increase.
c) Maharashtra, Goa, Kerala, Karnataka, Tamilnadu, Orissa, W. Bengal etc.
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संबंधित प्रश्न
What is an ecosystem ?
Which of the following is an artificial ecosystem?
(a) pond
(b) crop field
(c) lake
(d) forest
Name two decomposers operating in our ecosystem.
Differentiate between terrestrial and aquatic ecosystem.
Biome is
The second trophic level in a lake is ________________.
Find an odd one out.
Identify the similar characteristics of: Lantana, African catfish and Eichhomia.
Every food chain in the ecosystem begins with ______ which are the original source of food.
Which one of the following will undergo fastest bio-degradation?
An ecosystem is represented in the figure given above. This ecosystem will be self-sustaining if ______.
Zebra and goat come under ______ consumers.
______ are self-nourishing components of the ecosystem.
______ is the best example of natural terrestrial ecosystem.
Analogy:
Edaphic factor: Water in soil:: Physical factor: ______.
An example for artificial aquatic ecosystem is ______.
A Zoo is a natural ecosystem.
Match the Following:
| 1. | Edaphic factor | a. | Primary consumer |
| 2. | Snails | b. | Non biodegradable |
| 3. | Crow | c. | Decomposers |
| 4. | Earthworms | d. | Oranic matter in soil |
| 5. | Hazardous chemicals | e. | Omnivores |
Write the common food chain of a pond ecosystem.
Cooperation of the two photosystems of the chloroplast is required for:
