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प्रश्न
In a food chain, the initial organism is usually :
(a) photosynthetic
(b) herbivore
(c) saprophytic
(d) parasitic
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उत्तर
photosynthetic
The initial organism of a food chain is the producer, which produces food through photosynthesis.
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संबंधित प्रश्न
"Energy flow in a food chain is unidirectional" Justify this statement.
List two important roles play in the environment by decomposers.
Explain how the pesticides enter a food chain and subsequently get into our body.
Which category of organisms forms the starting point of a food chain?
Name the organisms belonging to the second and the fourth trophic levels in the food chain comprising the following :
Frogs, Plants, Snakes, Hawk, Insects
What is a trophic level?
Consider the food chain :
Grass → Deer → Lion
What will happen if all the lions are removed from the above food chain?
At which trophic level a person is feeding when he is eating eggs.
If a harmful chemical enters a food chain comprising cat, mice and plants, which one of these organisms is likely to have the maximum concentration of the harmful chemical in its body?
Name two predators of snakes in a food web operating in a forest ecosystem.
Fill in the following blank with suitable word :
Grass → ........... → Human
Which of the following gets the minimum energy through the food chain in an ecosystem?
(a) carnivore
(b) large carnivore
(c) producer
(d) herbivore
If the energy available at the producer level in a food chain is 150 J, how much energy will be transferred to : tertiary consumer?
(a) 15 J
(b) 10 J
(c) 1.50 J
(d) 0.15 J
The harmful chemical which is accumulating in human beings through food chain is :
(a) benzenehexachloride
(b) dichlorodiphenyltrichloroethane
(c) chlorofluorocarbon
(d) abscisic acid
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.
(a) In which organisms the pesticides enter from the polluted water? What is this level of organisms known as?
Arrange the following in a correct sequence and form a food chain
Rabbit → Carrot → Eagle → Snake
Arrange the following in a correct sequence and form a food chain
Human → Insect → Algae → Fish
In an ecosystem, herbivores represent ______.
A food chain comprising birds, green plants, fish and man. The concentration of harmful chemical entering the food chain will be maximum in ______.
Define – Heterotrophs.
