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प्रश्न
What are planktons?
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
What are trophic levels? Give an example of a food chain and state the different trophic levels in it.
Write a common food chain of a pond ecosystem having four links.
Write one or two word for the following statement/definition :
Each level of food chain where transfer of energy takes place
The following is a food chain that ends with human :
plants → bee → human
Explain how plants provide food for bees.
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?
Give one example of a food chain having four organisms. Below each organism write the three appropriate terms from the part (a) above which you think it represents.
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 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
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?
Observe the food web and answer the questions given below:
Why do all food chains start with plants?
