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

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)

EASY

Earn 100

In a grassland ecosystem, if the number of primary producers (plants) is approximately 6 million, the number of top carnivores, which may be supported by them will be

50% studentsanswered this correctly

Important Questions on Ecosystem

MEDIUM

Biology>Ecology and Environment>Ecosystem>Ecological Pyramids

Which of the following statements is incorrect regarding the phosphorus cycle?

MEDIUM

Biology>Ecology and Environment>Ecosystem>Ecological Pyramids

Which of the following statements is incorrect?

EASY

Biology>Ecology and Environment>Ecosystem>Ecological Pyramids

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

EXCEPT

EASY

Biology>Ecology and Environment>Ecosystem>Ecological Pyramids

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.

HARD

Biology>Ecology and Environment>Ecosystem>Ecological Pyramids

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

Biology>Ecology and Environment>Ecosystem>Ecological Pyramids

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

Biology>Ecology and Environment>Ecosystem>Ecological Pyramids

Which of the following is incorrect about Cynobacteria?

EASY

Biology>Ecology and Environment>Ecosystem>Ecological Pyramids

A farmer has applied chemical fertilisers in the crop field for many successive seasons, the crop growth was poor as soil lost its fertility. Suggest the suitable microorganism that replenishes the fertility of soil in this field.

EASY

Biology>Ecology and Environment>Ecosystem>Ecological Pyramids

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

Biology>Ecology and Environment>Ecosystem>Ecological Pyramids

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

MEDIUM

Biology>Ecology and Environment>Ecosystem>Ecological Pyramids

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

Biology>Ecology and Environment>Ecosystem>Ecological Pyramids

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

MEDIUM

Biology>Ecology and Environment>Ecosystem>Ecological Pyramids

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.

EASY

Biology>Ecology and Environment>Ecosystem>Ecological Pyramids

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

\to

Insect

\to

M

\to

Snake

\to

Eagle

EASY

Biology>Ecology and Environment>Ecosystem>Ecological Pyramids

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

HARD

Biology>Ecology and Environment>Ecosystem>Ecological Pyramids

Assertion ( $A$ ): A primary succession is more common than secondary succession.

Reason ( $R$ ): Biogeochemical cycling is absent in secondary succession.

MEDIUM

Biology>Ecology and Environment>Ecosystem>Ecological Pyramids

Which of the following statements is not correct?

EASY

Biology>Ecology and Environment>Ecosystem>Ecological Pyramids

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

Biology>Ecology and Environment>Ecosystem>Ecological Pyramids

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

MEDIUM

Biology>Ecology and Environment>Ecosystem>Ecological Pyramids

During ecological succession:

In a grassland ecosystem, if the number of primary producers (plants) is approximately 6 million, the number of top carnivores, which may be supported by them will be

Important Questions on Ecosystem

Learn and Prepare for any exam you want !