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प्रश्न
What are planktons?
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उत्तर
The tiny herbivorous plants and animals present in water are known as plankton. Plankton are classified as phytoplankton (plants) and zooplankton (animals).
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संबंधित प्रश्न
Which of the following are always at the second tropic level of food chains?
We do not clean natural ponds or lakes but an aquarium needs to be cleaned regularly. Why is it so ? Explain.
Name the organisms belonging to the second and the fourth trophic levels in the food chain comprising the following :
Frogs, Plants, Snakes, Hawk, Insects
A food chain represents a unidirectional flow of X. What is X?
Fill in the following blank with suitable word :
In nature, all green plants are............ whereas animals are consumers.
Define decomposers.
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.
Write one or two word for the following statement/definition :
Each level of food chain where transfer of energy takes place
Write one or two word for the following statement/definition :
Organisms which depend on the producers for food either directly or indirectly
In the figure given alongside, the various trophic levels are shown in the form of a pyramid. At which trophic level the maximum energy is available?
One of the following is a micro-consumer. This one is :
(a) ant
(b) lice
(c) fungi
(d) mosquito
Name the process in which a harmful chemical enters the food chain and gets concentrated at each trophic level.
Fill in the following blank with suitable word :
Lettuce → ............. → Fox
In addition to wheat plants, a crop field ecosystem has organisms such as snake, peacock, eagle and mice. If the wheat plants are sprayed with pesticides periodically, which of the following will have the minimum concentration of pesticides in the body?
(a) snake
(b) eagle
(c) mice
(d) peacock
Arrange the following in a correct sequence and form a food chain
Human → Insect → Algae → Fish
Which of the following is an autotroph?
______ obtained energy from the chemical breakdown of dead organisms.
Which statement is correct with respect to the food chain?
