Advertisements
Advertisements
प्रश्न
Name the process in which a harmful chemical enters the food chain and gets concentrated at each trophic level.
Advertisements
उत्तर
Biomagnification is the process by which a harmful chemical enters the food chain and gets concentrated at each trophic level.
APPEARS IN
संबंधित प्रश्न
List two biotic components of a biosphere.
Which category of organisms forms the starting point of a food chain?
Construct a food chain comprising the following :
Snakes, Hawk, Rats, Plants
Fill in the following blank with suitable word :
A series of organisms, each of which feeds on the next organism, the beginning of which is a green plant, is called a .............
Write down a food chain in the sea.
At which trophic level a person is feeding when he is eating bread.
In a food chain, the initial organism is usually :
(a) photosynthetic
(b) herbivore
(c) saprophytic
(d) parasitic
If a grasshopper is eaten by a frog, then the energy transfer will be from ______.
Which of the following statement is incorrect?
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?
The following is a food chain that ends with human :
plants → bee → human
How do bees provide food for humans?
The following is a food chain that ends with human :
How does this food chain differ form a usual food chain involving human such as : plants → goat → human?
Match the terms given in column I with the terms given in column II and column III having the same meaning :
| Column I | Column II | Column III |
| (1) Secondary consumer | Herbivore | 1st trophic level |
| (2) Primary consume | Autotroph | 3rd trophic level |
| (3) Producer | Carnivore | 4th trophic level |
| (4) Tertiary consumer | Large carnivore | 2nd trophic level |
Fill in the following blank with suitable word :
Pesticides enter the food chain at the ...........level
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.
What provides the energy which then flows through a food chain?
(a) glucose
(b) oxygen
(c) respiration
(d) sunlight
A food chain comprises of cat, seed-eating bird, plants, and dog. The organism which will have the maximum concentration of harmful pesticides coming through the food chain is most likely to be :
(a) cat
(b) plants
(c) dog
(d) seed-eating bird
The sequence of who eats whom in an ecosystem is called as ______.
Analogy:
Primary Consumer: Goat, Cow:: Secondary Consumer: ______.
DDT was sprayed in a lake to regulate breeding of mosquitoes. How would it affect the trophic levels in the following food chain associated with a lake? Justify your answer.
