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)

Carbon cycle is the process of circulation of carbon dioxide into the atmosphere. It is circulated through different processes such as respiration, burning of fossil fuels and also by the decomposition of dead animals and plants. During respiration, carbon dioxide is exhaled out by human beings. Similarly, all these processes release carbon dioxide into the atmosphere and the process is cyclic. The carbon cycle can be represented as:

HARD

Earn 100

How standing crop is different from the standing state.

Important Questions on Ecology and Environment

HARD

Biology>Ecology>Ecology and Environment>Nutrient Cycles

Represent the phosphorus cycle with a word diagram.

HARD

Biology>Ecology>Ecology and Environment>Nutrient Cycles

Give an account of the phosphorus cycle of an ecosystem.

MEDIUM

Biology>Ecology>Ecology and Environment>Nutrient Cycles

In a recent forest fire at the silent valley, phosphorous from the dead organisms was released into the soil due to a specific organism. Name the organism.

MEDIUM

Biology>Ecology>Ecology and Environment>Nutrient Cycles

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

MEDIUM

Biology>Ecology>Ecology and Environment>Nutrient Cycles

Which process is unidirectional in nitrogen cycle?

MEDIUM

Biology>Ecology>Ecology and Environment>Nutrient Cycles

During ecological succession:

EASY

Biology>Ecology>Ecology and Environment>Nutrient Cycles

Name any one symbiotic nitrogen fixing bacteria. How does it help in nitrogen fixation?

EASY

Biology>Ecology>Ecology and Environment>Nutrient Cycles

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

EASY

Biology>Ecology>Ecology and Environment>Nutrient Cycles

Schematically represent phosphorous cycle.

EASY

Biology>Ecology>Ecology and Environment>Nutrient Cycles

Differentiate between the carbon cycle and phosphorus cycle that operate in nature by giving two points.

MEDIUM

Biology>Ecology>Ecology and Environment>Nutrient Cycles

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

EASY

Biology>Ecology>Ecology and Environment>Nutrient Cycles

Which one of the following element never goes to the atmosphere?

HARD

Biology>Ecology>Ecology and Environment>Nutrient Cycles

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.

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