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Which of the Following is Not a Producer? (A) Grass (B) Zooplankton (C) Phytoplankton (D) Paddy - Science

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प्रश्न

Which of the following is not a producer?
(a) grass
(b) zooplankton
(c) phytoplankton
(d) paddy

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उत्तर

zooplankton
Zooplankton are herbivorous micro-organisms such as protozoa that are found in water bodies. They depend upon producers for food and hence are not producers.

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अध्याय 5: Our Environment - Exercise 1 [पृष्ठ २२९]

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लखमीर सिंग Biology (Science) [English] Class 10
अध्याय 5 Our Environment
Exercise 1 | Q 68 | पृष्ठ २२९

वीडियो ट्यूटोरियलVIEW ALL [1]

संबंधित प्रश्न

List two important roles play in the environment by decomposers.


"Our food grains such as wheat and rice, the vegetables and fruits and even meat are found to contain varying amounts of pesticide residues." State the reason to explain how and why it happens?


What is biological magnification?


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 are the various steps of food chain called?


Fill in the following blank with suitable word :
Decomposer organisms are..........in their action.


Define decomposers. 


What is meant by a primary consumer, secondary consumer and a tertiary consumer? Give one example of each.


What is a trophic level?


Write down a food chain in the sea.


Write down a food chain which ends with humans.


Give one example of a simple food chain.


What is a 'food web'? Show its formation.


Fill in the following blank with suitable word :

Lettuce → ............. → Fox


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.


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.

Which other organism you could write in place of bird in the above food chain?


Human body is made up of five important components, of which water is the main component. Food, as well as potable water, are essential for every human being. The food is obtained from plants through agriculture. Pesticides are being used extensively for a high yield in the fields. These pesticides are absorbed by the plants from the soil along with water and minerals and from the water bodies these pesticides are taken up by the aquatic animals and plants. As these chemicals are not biodegradables, they get accumulated progressively at each trophic level. The maximum concentration of these chemicals gets accumulated in our bodies and greatly affects the health of our mind and body.

  1. Why is the maximum concentration of pesticides found in human beings?  (1)
  2. Give one method which could be applied to reduce our intake of pesticides through food to some extent.  (1)
  3. Various steps in a food chain represent: 
    1. Food web
    2. Trophic level
    3. Ecosystem
    4. Biomagnification  (1)
  4. With regard to various food chains operating in an ecosystem, man is a:
    1. Consumer
    2. Producer
    3. Producer and consumer
    4. Producer and decomposer  (1)

The process of accumulation of harmful chemical substances like pesticides, in the body of living organisms at each trophic level of a food chain is known as ______.


Accumulation of non-biodegradable pesticides in the food chain in increasing amount at each higher trophic level is known as


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