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प्रश्न
What would happen to the number of grass plants and foxes if the number of rabbits increased?
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उत्तर
If the number of rabbits increases, it will lead to rabbits consuming more grass plants, and hence grass plants will become sparser. As foxes consume rabbits, any increase in the number of rabbits will lead to an increase in the number of foxes.
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संबंधित प्रश्न
The first trophic level in a food chain is always a green plant. Why ?
List two main components of ecosystem?
What will happen if we kill all the organisms in one trophic level?
Explain how the pesticides enter a food chain and subsequently get into our body.
Construct a food chain comprising the following :
Snakes, Hawk, Rats, Plants
Name one decomposer.
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.
Construct a short foodchain, ending with man.
Write one or two word for the following statement/definition :
Each level of food chain where transfer of energy takes place
If a grasshopper is eaten by a frog, then the energy transfer will be from ______.
In the food chain comprising of a snake, grass, insect, and frog, the secondary consumer is :
(a) insect
(b) snake
(c) frog
(d) grass
The sea water contains water beetles, tadpole, fish and weeds.
Which organism is a secondary consumer?
Explain how harmful chemicals enter our bodies.
What is meant by bioconcentration of pesticides
An aquatic food chain comprises of the organisms like tadpoles, weeds, fish and water beetles. The organism which gets the minimum energy through this food chain is :
(a) water beetles
(b) tadpoles
(c) weeds
(d) fish
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)
Primary consumers that eat plants are called _______.
If 100 J energy is available at the producer level in a food chain then the energy available to the secondary consumer will be ______.
Which of the following is a logical sequence of food chain?
The food chain begins with the energy given by the ______.
