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In a Food Chain, the Initial Organism is Usually : (A) Photosynthetic (B) Herbivore (C) Saprophytic (D) Parasitic - Science

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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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पाठ 5: Our Environment - Exercise 1 [पृष्ठ २२८]

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लखमीर सिंह Biology (Science) [English] Class 10
पाठ 5 Our Environment
Exercise 1 | Q 47 | पृष्ठ २२८

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संबंधित प्रश्‍न

Give reason to justify the following: The existence of decomposers is essential in a biosphere.


We do not clean natural ponds or lakes but an aquarium needs to be cleaned regularly. Why is it so ? Explain.


In the following food chain, 100 J of energy is available to the lion. How much energy was available to the producer?

Plants → Deer → Lion


At which trophic level a person is feeding when he is eating roasted chicken.


What is a food chain?


Which of the following are decomposers of dead organisms?

Bacteria Fungi Viruses
(a) no yes yes
(b) yes no yes
(c) yes yes  no
(d) yes yes yes

Organisms which synthesise carbohydrates from inorganic compounds by using radiant energy are called ______.


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?


A food chain occurring in the sea which provides food for many people can be written as :
phytoplankton → zooplankton → X → Y

What could be X?


What would happen to the number of rabbits and grass plants if the number of foxes increased?


The following statement is true or false :
Only 10 per cent of the light energy given by the sun is available for transfer at each higher trophic level in a food chain.


Why are there rarely more than five links (or five organisms) in a food chain?


Name two predators of snakes in a food web operating in a forest ecosystem.


What provides the energy which then flows through a food chain?
(a) glucose
(b) oxygen
(c) respiration
(d) sunlight


What are decomposers? What will be the consequence if the decomposers are completely eradicated from an ecosystem? Give justification in support of your answer.


Observe the food web and answer the questions given below:

Why do all food chains start with plants?


Define – Heterotrophs.


What will happen if deer is missing in the food chain given below?

Grass → Deer → Tiger


Study the picture given below showing three food chains (a), (b) and (c) and answer the following questions:

  1. Name the type of ecosystems that exist in food chains (b) and (c).
  2. The first trophic level in all food chains is producers. Why? What percentage of solar energy do these producers capture for their use?
  3. Why are the arrows shown in the diagram in one direction only and not vice versa? Justify.

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