Energy Flow in an Ecosystem

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1) what are the organisms that are dependent on their food

2 points

) Consumers

b) Producers

c) Decomposers

d) Scavengers

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2) Who are the major producers in an aquatic ecosystem

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a) Zooplankton

b) Phytoplankton

c) Fungi

d) Bacteria

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3) An ecosystem possesses

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(a) Only living component

(b) Only non- living component

(d) None of the above

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(4) …………… flows through an ecosystem

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(a) Water

(b) Energy

(d) Carbon

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(5) Organisms which decomposes the bodies of dead animals called

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(a) Producers

(b) Decomposers

(d) Apex consumers

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6) ……………… are autotrophic organism with the ability to carry on photosynthesis and to make own food.

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(a) Herbivores

(b) Carnivores

(d) Producers

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(7) When number of food chains link to each other in an ecosystem is known as

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(a) Food pyramid

(b) Food web

(d) None of these

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(8) …………………is the number of organisms multiplied by their weight.

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(a) Tropic level

(b) Biomass

(d) All of these

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9) Plants convert carbon dioxide into carbohydrates by the process of

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(a) Respiration

(b) Photosynthesis

(d) Krebs cycle

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(10) The cyclic flow of nutrients within an ecosystem is called

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(a) Nitrogen cycle

(b) Bio-geo-chemical cycle

(d) Carbon cycle

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