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Which of the following is an artificial ecosystem?

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Important Questions on Ecosystem: Structure and Function

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NTA Errorless Biology Volume-2>Chapter 18 - Ecosystem: Structure and Function>Ordinary Thinking>Q 50

The figure given below shows a particular food web. Each alphabet represents a different species. Arrows indicate the flow of energy and materials. Which of the following would probably have the greatest total biomass

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NTA Errorless Biology Volume-2>Chapter 18 - Ecosystem: Structure and Function>Ordinary Thinking>Q 51
In a pyramid of biomass, if the total dry weight (kg/m2) of primary producers is about 809, it will decrease at tertiary consumer level up to:
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NTA Errorless Biology Volume-2>Chapter 18 - Ecosystem: Structure and Function>Ordinary Thinking>Q 52
When the number of organisms at successive levels are plotted, they assume the shape of a pyramid. This is called the pyramid of
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NTA Errorless Biology Volume-2>Chapter 18 - Ecosystem: Structure and Function>Ordinary Thinking>Q 53
The loss of energy as one proceeds from one trophic level to the next higher level is approximately
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NTA Errorless Biology Volume-2>Chapter 18 - Ecosystem: Structure and Function>Ordinary Thinking>Q 54
In a food chain, the total amount of living material is depicted by
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NTA Errorless Biology Volume-2>Chapter 18 - Ecosystem: Structure and Function>Ordinary Thinking>Q 55

The figure given below shows estimated values for carbon fixation in a terrestrial ecosystem. Diagram refer to tones x 109, fixed or available for fixation

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Which result can be drawn from the figure

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NTA Errorless Biology Volume-2>Chapter 18 - Ecosystem: Structure and Function>Ordinary Thinking>Q 56

Two food chains are given below Tree to aphid to an insectivorous bird to bird of prey.

Phytoplankton to zooplankton to plankton to feeding fish to carnivorous fish.

Which diagram is a pyramid of energy representing both food chains

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NTA Errorless Biology Volume-2>Chapter 18 - Ecosystem: Structure and Function>Ordinary Thinking>Q 58
Green plants constitute