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प्रश्न
Write an aquatic food chain.
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उत्तर
An aquatic food chain is one that operates in a water body such as a pond, a lake, or an ocean.
Phytoplankton → Zooplankton → Small Fish → Larger Fish → Sharks
In this aquatic food chain, energy flows from the producers (phytoplankton) up through various consumer levels to the apex predators (sharks). Each level plays a role in ecosystem stability, nutrient cycling, and energy transfer.
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संबंधित प्रश्न
In a food chain of frog, grass, insect and snake, assign trophic level to frog.
Which of the following belong to the same trophic level?
Tree ; Frog ; Snake ; Grass ; Lizard
What is a trophic level?
What will happen if we kill all the organisms in one trophic level?
What is the difference between the food habits of organisms belonging to the first and the third trophic levels? Give one example each of the organisms belonging to these two trophic levels.
Write one or two word for the following statement/definition :
Organisms which depend on the producers for food either directly or indirectly
Give one example of a simple food chain.
Which of the following represents a possible food chain found in a pond :
| Primary producers |
Primary consumers | Secondary consumers |
| (a) green algae | fish | mosquito larvae |
| (b) fish | green algae | mosquito larvae |
| (c) mosquito larvae | fish | green algae |
| (d) green algae | mosquito larvae | fish |
Which of the following are decomposers of dead organisms?
| Bacteria | Fungi | Viruses |
| (a) no | yes | yes |
| (b) yes | no | yes |
| (c) yes | yes | no |
| (d) yes | yes | yes |
If a grasshopper is eaten by a frog, then the energy transfer will be from ______.
What will happen if deer is missing in the food chain given below?
Grass → Deer → Tiger
Fill in the following blank with suitable word :
Plants → Antelope → ............
Consider the following food chain
(i) Plants → Mice → Snakes → Hawks
(ii) Plants → Mice →Hawks
If energy available at the producer level in both the food chains is 100 J, in which case will hawks get more energy as food and by how much? Justify your answer.:
Which of the following limits the number of trophic levels in a food chain?
(a) insufficient food supply from producer level
(b) decrease in energy at higher trophic levels
(c) increase in the number of organisms at higher trophic levels
(d) accumulation of harmful chemicals at higher trophic levels
Which of the following gets the minimum energy through the food chain in an ecosystem?
(a) carnivore
(b) large carnivore
(c) producer
(d) herbivore
Human body is made up of five important components, of which water is the main component. Food, as well as potable water, are essential for every human being. The food is obtained from plants through agriculture. Pesticides are being used extensively for a high yield in the fields. These pesticides are absorbed by the plants from the soil along with water and minerals and from the water bodies these pesticides are taken up by the aquatic animals and plants. As these chemicals are not biodegradables, they get accumulated progressively at each trophic level. The maximum concentration of these chemicals gets accumulated in our bodies and greatly affects the health of our mind and body.
- Why is the maximum concentration of pesticides found in human beings? (1)
- Give one method which could be applied to reduce our intake of pesticides through food to some extent. (1)
- Various steps in a food chain represent:
- Food web
- Trophic level
- Ecosystem
- Biomagnification (1)
- With regard to various food chains operating in an ecosystem, man is a:
- Consumer
- Producer
- Producer and consumer
- Producer and decomposer (1)
Arrange the following in a correct sequence and form a food chain
Human → Insect → Algae → Fish
The food chain begins with the energy given by the ______.
Each level in the food chain is called a ______ level.
In a food chain grasshopper gets energy by eating frog.
