Match the trophic levels with their correct species examples in grassland ecosystem. (a) Fourth trophic level (i) Crow (b) Second trophic level (ii) Vulture (c) First trophic level (iii) Rabbit (d) Third trophic level (iv) Grass Select the correct option.

(a)-(ii), (b)-(iii), (c)-(iv), (d)-(i)

(a)-(iii), (b)-(ii), (c)-(i), (d)-(iv)

(a)-(iv), (b)-(iii), (c)-(ii), (d)-(i)

(a)-(i), (b)-(ii), (c)-(iii), (d)-(iv)

Match the following lists: List- I List- II (A) Rooted hydrophyte with floating leaves (I) Limnophila (B) Submerged suspended hydrophyte (II) Vallisneria (C) Free floating hydrophyte (III) Utricularia (D) Amphibious plant (IV) Victoria regia (V) Salvinia The correct match is:

A = IV , B = III , C = V , D = I

A = II , B = IV , C = III , D = I

A = III , B = V , C = I , D = II

A = IV , B = I , C = II , D = III

Which of the following statements is true about cyanobacteria

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?

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

If 20J of energy is trapped at producer level, then how much energy will be available to peacock as food in the following chain?
plant

\to

mice

\to

snake

\to

peacock

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

Match the trophic levels with their correct species examples in grassland ecosystem.

(a)	Fourth trophic level	(i)	Crow
(b)	Second trophic level	(ii)	Vulture
(c)	First trophic level	(iii)	Rabbit
(d)	Third trophic level	(iv)	Grass

Select the correct option.

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 regarding the phosphorus cycle?

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

During ecological succession:

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

The rate of decomposition is faster in the ecosystem due to following factors

EXCEPT

:

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

In relation to Gross primary productivity and Net primary productivity of an ecosystem, which one of the following statements is correct?

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

Match the following lists:

	List- $I$		List- $II$
(A)	Rooted hydrophyte with floating leaves	(I)	Limnophila
(B)	Submerged suspended hydrophyte	(II)	Vallisneria
(C)	Free floating hydrophyte	(III)	Utricularia
(D)	Amphibious plant	(IV)	Victoria regia
		(V)	Salvinia

The correct match is:

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

Vertical distribution of different species occupying different levels in a biotic community is known as:

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

The primary producers of the deep-sea hydrothermal vent ecosystem are

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

Identify the possible link 'M' in the following food chain:
Plant

\to

Insect

\to

M

\to

Snake

\to

Eagle

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

Archaebacteria differ from eubacteria in ______.

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

Choose the incorrect statements.
A) Pollinators play significant role in the production of food crops.
B) One of the threats to pollinators is habitat destruction by land use.
C) The climax community remain stable as long as environment is changing with adoptions.
D) Secondary succession will be a slow process compared to the primary succession.

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 is incorrect about Cynobacteria?

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

Identify combination of incorrect statements related to Cyanobacteria
I. Cyanobacteria are referred to as blue-green algae.
II. They perform oxygenic photosynthesis in chloroplasts.
II. The red-colour of red-sea is due to the presence of a cyanobacterial species Trichodesmium erythraeum.
IV. All the cyanobacterial species can fix atmospheric

N_{2}

in specialised cells called heterocysts.

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

A violent volcanic eruption wiped out most of the life forms in an island. Over different forms of simple organisms colonised this region, followed by the emergence of other organisms such as shrubs, woody plants, invertebrates and mammals. This ecological process is referred to as

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

Study the following statements and select the correct ones:
I) In a thermally stratified lake, in winter, the upper layer is known as epilimnion.
II) Animals in a lake that are capable of swimming constitute neuston.
III) The natural interconnections of food chain forms a network called food web.
IV) Energy flow in an ecosystem is unidirectional.

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

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

Bacteria 'eater's are

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

Archaebacteria differs from eubacteria in:

Which of the following statements is true about cyanobacteria?

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.

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