EASY
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What is pyramid of energy?

Important Questions on Construct and revise an explanation based on evidence for the cycling of matter and flow of energy in aerobic and anaerobic conditions.

EASY
Life Sciences>Ecosystems: Interactions, Energy, and Dynamics>Construct and revise an explanation based on evidence for the cycling of matter and flow of energy in aerobic and anaerobic conditions.>Cycles of Matter and Energy Transfer in Ecosystems - Photosynthesis and cellular respiration (including anaerobic processes) provide most of the energy for life processes
What is ecological pyramid ? Explain different types of ecological pyramid with diagram
HARD
Life Sciences>Ecosystems: Interactions, Energy, and Dynamics>Construct and revise an explanation based on evidence for the cycling of matter and flow of energy in aerobic and anaerobic conditions.>Cycles of Matter and Energy Transfer in Ecosystems - Photosynthesis and cellular respiration (including anaerobic processes) provide most of the energy for life processes
What does an ecological pyramid represent? State any two limitations that these pyramids have.
EASY
Life Sciences>Ecosystems: Interactions, Energy, and Dynamics>Construct and revise an explanation based on evidence for the cycling of matter and flow of energy in aerobic and anaerobic conditions.>Cycles of Matter and Energy Transfer in Ecosystems - Photosynthesis and cellular respiration (including anaerobic processes) provide most of the energy for life processes
Define standing crop.
HARD
Life Sciences>Ecosystems: Interactions, Energy, and Dynamics>Construct and revise an explanation based on evidence for the cycling of matter and flow of energy in aerobic and anaerobic conditions.>Cycles of Matter and Energy Transfer in Ecosystems - Photosynthesis and cellular respiration (including anaerobic processes) provide most of the energy for life processes
What are ecological pyramids? Describe briefly different types of ecological pyramids with suitable diagrams.
EASY
Life Sciences>Ecosystems: Interactions, Energy, and Dynamics>Construct and revise an explanation based on evidence for the cycling of matter and flow of energy in aerobic and anaerobic conditions.>Cycles of Matter and Energy Transfer in Ecosystems - Photosynthesis and cellular respiration (including anaerobic processes) provide most of the energy for life processes
Choose the correct statements related to ecological pyramids?
(i) The trophic relationship is expressed in terms of numbers, biomass or energy arranged one on the top of its lower trophic level, resulting in a pyramid shape.
(ii) The base of each pyramid represents producers, while the apex represents the top order consumers.
(iii) The pyramid of biomass in sea is generally upright.
(iv) In the case of parasite food chain, the pyramid of number is inverted.
(v) Some species belonging to two or more trophic levels is not limitation of ecological pyramid.
EASY
Life Sciences>Ecosystems: Interactions, Energy, and Dynamics>Construct and revise an explanation based on evidence for the cycling of matter and flow of energy in aerobic and anaerobic conditions.>Cycles of Matter and Energy Transfer in Ecosystems - Photosynthesis and cellular respiration (including anaerobic processes) provide most of the energy for life processes
State what ‘standing crop’ of a trophic level represents.
EASY
Life Sciences>Ecosystems: Interactions, Energy, and Dynamics>Construct and revise an explanation based on evidence for the cycling of matter and flow of energy in aerobic and anaerobic conditions.>Cycles of Matter and Energy Transfer in Ecosystems - Photosynthesis and cellular respiration (including anaerobic processes) provide most of the energy for life processes

Give a reason for each of the following:

The shape of the pyramid of biomass in an aquatic ecosystem is inverted.

MEDIUM
Life Sciences>Ecosystems: Interactions, Energy, and Dynamics>Construct and revise an explanation based on evidence for the cycling of matter and flow of energy in aerobic and anaerobic conditions.>Cycles of Matter and Energy Transfer in Ecosystems - Photosynthesis and cellular respiration (including anaerobic processes) provide most of the energy for life processes

Given below is data showing number of individuals and dry weight of different trophic levels in a grassland ecosystem. Construct:

Pyramid of Biomass

Trophic Level Number of individuals Dry weight (Kg m-2)
Primary Producer 5,84,2000 809
Primary consumer 7,08,000 37
Secondary consumer 3.54,000 11
Tertiary consumer 3 1.5
HARD
Life Sciences>Ecosystems: Interactions, Energy, and Dynamics>Construct and revise an explanation based on evidence for the cycling of matter and flow of energy in aerobic and anaerobic conditions.>Cycles of Matter and Energy Transfer in Ecosystems - Photosynthesis and cellular respiration (including anaerobic processes) provide most of the energy for life processes
Study the following graph of the metabolic rate of various terrestrial mammals as a function of their body mass and choose the correct option below.

Question Image
EASY
Life Sciences>Ecosystems: Interactions, Energy, and Dynamics>Construct and revise an explanation based on evidence for the cycling of matter and flow of energy in aerobic and anaerobic conditions.>Cycles of Matter and Energy Transfer in Ecosystems - Photosynthesis and cellular respiration (including anaerobic processes) provide most of the energy for life processes
What is a trophic level in an ecosystem ? What is ‘standing crop’ with reference to it?
EASY
Life Sciences>Ecosystems: Interactions, Energy, and Dynamics>Construct and revise an explanation based on evidence for the cycling of matter and flow of energy in aerobic and anaerobic conditions.>Cycles of Matter and Energy Transfer in Ecosystems - Photosynthesis and cellular respiration (including anaerobic processes) provide most of the energy for life processes
Nowadays bio-diesel is used in transportation vehicles as an alternate to diesel. Write two advantages of this measure.
MEDIUM
Life Sciences>Ecosystems: Interactions, Energy, and Dynamics>Construct and revise an explanation based on evidence for the cycling of matter and flow of energy in aerobic and anaerobic conditions.>Cycles of Matter and Energy Transfer in Ecosystems - Photosynthesis and cellular respiration (including anaerobic processes) provide most of the energy for life processes
Which of the following statements is incorrect?
HARD
Life Sciences>Ecosystems: Interactions, Energy, and Dynamics>Construct and revise an explanation based on evidence for the cycling of matter and flow of energy in aerobic and anaerobic conditions.>Cycles of Matter and Energy Transfer in Ecosystems - Photosynthesis and cellular respiration (including anaerobic processes) provide most of the energy for life processes
If the age pyramid is triangle then choose correct answer from the given options.
HARD
Life Sciences>Ecosystems: Interactions, Energy, and Dynamics>Construct and revise an explanation based on evidence for the cycling of matter and flow of energy in aerobic and anaerobic conditions.>Cycles of Matter and Energy Transfer in Ecosystems - Photosynthesis and cellular respiration (including anaerobic processes) provide most of the energy for life processes

What are ecological pyramids. What are its types?

MEDIUM
Life Sciences>Ecosystems: Interactions, Energy, and Dynamics>Construct and revise an explanation based on evidence for the cycling of matter and flow of energy in aerobic and anaerobic conditions.>Cycles of Matter and Energy Transfer in Ecosystems - Photosynthesis and cellular respiration (including anaerobic processes) provide most of the energy for life processes
Which one of the following has the largest population in a food chain?
MEDIUM
Life Sciences>Ecosystems: Interactions, Energy, and Dynamics>Construct and revise an explanation based on evidence for the cycling of matter and flow of energy in aerobic and anaerobic conditions.>Cycles of Matter and Energy Transfer in Ecosystems - Photosynthesis and cellular respiration (including anaerobic processes) provide most of the energy for life processes
What is ecological pyramid?
MEDIUM
Life Sciences>Ecosystems: Interactions, Energy, and Dynamics>Construct and revise an explanation based on evidence for the cycling of matter and flow of energy in aerobic and anaerobic conditions.>Cycles of Matter and Energy Transfer in Ecosystems - Photosynthesis and cellular respiration (including anaerobic processes) provide most of the energy for life processes

Given below is data showing number of individuals and dry weight of different trophic levels in a grassland ecosystem. Construct:

Pyramid of number

Trophic Level Number of individuals Dry weight (Kg m-2)
Primary Producer 5,84,2000 809
Primary consumer 7,08,000 37
Secondary consumer 3.54,000 11
Tertiary consumer 3 1.5
MEDIUM
Life Sciences>Ecosystems: Interactions, Energy, and Dynamics>Construct and revise an explanation based on evidence for the cycling of matter and flow of energy in aerobic and anaerobic conditions.>Cycles of Matter and Energy Transfer in Ecosystems - Photosynthesis and cellular respiration (including anaerobic processes) provide most of the energy for life processes
Describe an inverted pyramid of biomass with the help of an example.
MEDIUM
Life Sciences>Ecosystems: Interactions, Energy, and Dynamics>Construct and revise an explanation based on evidence for the cycling of matter and flow of energy in aerobic and anaerobic conditions.>Cycles of Matter and Energy Transfer in Ecosystems - Photosynthesis and cellular respiration (including anaerobic processes) provide most of the energy for life processes
Which of the following statements is not correct?
EASY
Life Sciences>Ecosystems: Interactions, Energy, and Dynamics>Construct and revise an explanation based on evidence for the cycling of matter and flow of energy in aerobic and anaerobic conditions.>Cycles of Matter and Energy Transfer in Ecosystems - Photosynthesis and cellular respiration (including anaerobic processes) provide most of the energy for life processes
Which of the following ecological pyramids is generally inverted?