Advertisements
Advertisements
Fill in the following blank with suitable word :
Pesticides enter the food chain at the ...........level
Concept: undefined >> undefined
Fill in the following blank with suitable word :
Grass → ........... → Human
Concept: undefined >> undefined
Advertisements
Fill in the following blank with suitable word :
Lettuce → ............. → Fox
Concept: undefined >> undefined
Fill in the following blank with suitable word :
Plants → Antelope → ............
Concept: undefined >> undefined
What is ten per cent law? Explain with an example.
Concept: undefined >> undefined
Explain how harmful chemicals enter our bodies.
Concept: undefined >> undefined
'If we excessively use pesticides to protect the crops from diseases, then it may cause long-term damage to mankind'. Justify this statement.
Concept: undefined >> undefined
Will the levels of biological magnification be different at different levels of the ecosystem?
Concept: undefined >> undefined
With the help of a food chain, explain how biological magnification of harmful chemicals can occur.
Concept: undefined >> undefined
What is meant by bioconcentration of pesticides
Concept: undefined >> undefined
Which common pesticide has accumulated in human body in considerable amounts?
Concept: undefined >> undefined
What does garbage consist of?
Concept: undefined >> undefined
Explain why, the flow of energy in the ecosystem is said to be unidirectional.
Concept: undefined >> undefined
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.:
Concept: undefined >> undefined
Explain why, a food chain usually cannot have more than three or four steps.
Concept: undefined >> undefined
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
Concept: undefined >> undefined
Name and state the law given by Lindeman which tells us how much energy entering a particular trophic level of organisms is available for trasnsfer to the next higher trophic level.
Concept: undefined >> undefined
How much energy will be available to hawks in the food chain comprising hawk, snake, paddy and mice, if 10,000 J of energy is available to paddy from the sun?
Concept: undefined >> undefined
On what basis is a chemical equation balanced?
Concept: undefined >> undefined
What provides the energy which then flows through a food chain?
(a) glucose
(b) oxygen
(c) respiration
(d) sunlight
Concept: undefined >> undefined
