Advertisements
Advertisements
प्रश्न
What is meant by a primary consumer?
Advertisements
उत्तर
A primary consumer is an organism that feeds directly on producers (green plants or algae). It is usually a herbivore and occupies the second trophic level in a food chain.
APPEARS IN
संबंधित प्रश्न
Give reason to justify the following: Flow of energy in a food chain is unidirectional.
List two biotic components of a biosphere.
What are trophic levels? Give an example of a food chain and state the different trophic levels in it.
Which of the following constitute a food-chain?
Explain how the pesticides enter a food chain and subsequently get into our body.
Explain the term ‘producer’.
What will happen if we kill all the organisms in one trophic level?
Consider the food chain :
Grass → Deer → Lion
What will happen if all the lions are removed from the above food chain?
Write down a food chain with five links in it.
At which trophic level a person is feeding when he is eating bread.
What is a 'food web'? Show its formation.
One of the following is not a consumer. This one is :
(a) giraffe
(b) antelope
(c) algae
(d) alligator
Why are there rarely more than five links (or five organisms) in a food chain?
Name two predators of snakes in a food web operating in a forest ecosystem.
Fill in the following blank with suitable word :
Lettuce → ............. → Fox
Calculate the amount of energy that will be available to big fish in the following food chain, if 10,000 J of energy is available to small algae from the sun :
Small algae → Zooplankton → Fish → Big fish
| A food chain consists of fish, larvae, phytoplanktons and birds. The level of pesticides in water in which the fish, larvae and phytoplanktons live is quite high. |
- In which organisms the pesticides enter from the polluted water? What is this level of organisms known as?
- Which organism will have the maximum amount of pesticides accumulated through the food chain? What is this process known as?
- Write the food chain comprising all the organisms mentioned above.
- Which other organism you could write in place of bird in the above food chain?
Write the importance of the food chain.
Which of the following statements is correct?
In the food chain Grass → Insects → Thrush → Sparrow Hawk, what is the trophic level of the thrush?
