Advertisements
Advertisements
प्रश्न
Name the organisms belonging to the second and the fourth trophic levels in the food chain comprising the following :
Frogs, Plants, Snakes, Hawk, Insects
Advertisements
उत्तर
The second trophic level consists of insects, and the fourth trophic level consists of snakes.
APPEARS IN
संबंधित प्रश्न
What are trophic levels? Give an example of a food chain and state the different trophic levels in it.
What is biological magnification?
Construct a food chain comprising the following :
Snakes, Hawk, Rats, Plants
Can the organisms of any trophic level be removed without causing any damage to the ecosystem? Will the impact of removing all the organisms in a trophic level be different for different trophic levels?
Write down a food chain which ends with humans.
At which trophic level a person is feeding when he is eating bread.
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 |
In a food chain consisting of grass, frog, bird and insects, where will the concentration of the harmful chemicals be maximum?
Name two predators of snakes in a food web operating in a forest ecosystem.
Explain how harmful chemicals enter our bodies.
Will the levels of biological magnification be different at different levels of the ecosystem?
With the help of a food chain, explain how biological magnification of harmful chemicals can occur.
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
The surface of water in a lake appears green due to a layer of tiny free-floating organisms X on its surface. The lake water also contains organisms like water beetle, fish and tadpole. The sun shines over the lake water and provides energy for the functioning of this lake ecosystem.
(a) What could organisms X be?
(b) Write a food chain comprising of all the four organisms mentioned.
(c) What is the general name of the food chains like the one written above?
(d) Name (i) secondary consumer (ii) producer (iii) tertiary consumer, and (iv) primary consumer, in the above food chain.
(e) If the tertiary consumer gets 0.2 J of energy from the secondary consumer, then how much energy was radiated by the sun to the producer?
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 ______.
Which of the following is a logical sequence of food chain?
Analogy:
Primary Consumer: Goat, Cow:: Secondary Consumer: ______.
Which group of organisms are not constituents of a food chain?
- Grass, lion, rabbit, wolf
- Plankton, man, fish, grasshopper
- Wolf, grass, snake, tiger
- Frog, snake, eagle, grass, grasshopper
