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प्रश्न
The sea water contains water beetles, tadpole, fish and weeds.
Which organisms are (i) predators, and (ii) prey?
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उत्तर
The water beetle and the fish are predators, and (ii) the tadpole and the water beetle are prey.
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संबंधित प्रश्न
What will happen if we kill all the organisms in one trophic level?
In the following food chain, 20,000 J of energy was available to the plants. How much energy would be available to man in this chain?
Plants → Sheep → Man
Why are plants called producers?
Which of the following belong to the same trophic level?
Tree ; Frog ; Snake ; Grass ; Lizard
Name the organisms belonging to the second and the fourth trophic levels in the food chain comprising the following :
Frogs, Plants, Snakes, Hawk, Insects
What are the various steps of food chain called?
What is meant by a primary consumer, secondary consumer and a tertiary consumer? Give one example of each.
At which trophic level a person is feeding when he is eating roasted chicken.
A food chain occurring in the sea which provides food for many people can be written as :
phytoplankton → zooplankton → X → Y
Which organism in the above food chain is a (1) primary consumer, and (2) tertiary consumer?
Some hunters are roaming in the plush green forest of Africa. They spot a deer and kill it. They decide to roast the deer there and then and eat it. When the hunters had just finished enjoying the feast of roasted deer, a lion attacks them. The lion kills one of the hunters and eats his flesh.
(a) write a food chain which provides food to lion in this case.
(b) Which animal (other than deer) the lion could look for food if he did not get the hunter as prey?
(c) Which other animal in the forest could have been in place of lion?
(d) How does the above food chain differ form the food chain such as : plants → goat → man?
What would happen to the number of rabbits and grass plants if the number of foxes increased?
If 5 joules of energy is available at producer level (plants), then how much energy will be transferred to the lion in the following food chain?
Plants → Goat → Lion
Fill in the following blank with suitable word :
Lettuce → ............. → Fox
What is meant by bioconcentration of pesticides
What does garbage consist of?
The process of accumulation of harmful chemical substances like pesticides, in the body of living organisms at each trophic level of a food chain is known as ______.
Natural agents like ______ are the decomposition factors breaking complex forms into simpler units.
What is Autotrophs?
In a food chain, the third trophic level is always occupied by
Assertion (A): The energy which passes to the herbivores does not come back to autotrophs.
Reason (R): The flow of energy in a food chain is unidirectional.
