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प्रश्न
Why are plants called producers?
उत्तर
Plants are known as producers because they prepare their food themselves by the process of photosynthesis.
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संबंधित प्रश्न
Define decomposers.
Name one decomposer.
A student went to study a local pond. In one part of the pond she noticed tadpoles scraping at some pond weed. In another part she saw a water beetle holding a tadpole in its jaws.
(a) Construct a food chain for the pond.
(b) How many links are there in this chain?
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 organisms are (i) predators, and (ii) prey?
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?
With the help of a food chain, explain how biological magnification of harmful chemicals can occur.
Observe the food web and answer the questions given below:
Why do all food chains start with plants?
Define – Heterotrophs.
In a food chain, the third trophic level is always occupied by
