A niche is a position that an individual has in its environment.

A niche is the value of an individual in its environment.

A niche is the total grade of an individual in its environment.

A niche is a position that an individual has in its environment.

The ecosystem is the functional unit of nature in which living organisms interact with each other as well as their surrounding physical environment. The interdependence of biotic and abiotic factors is exhibited in an ecosystem.

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What is a niche?

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Important Questions on How do Organisms Reproduce?

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Biology>Biology - Xth Grade>How do Organisms Reproduce?>Introduction to Reproduction in Organisms

Assertion (

A

): Landscape is the unit of land containing different ecosystems surrounded by natural boundaries.
Reason (

R

): Landscape is the level of organization that is higher than the ecosystem.

MEDIUM

Biology>Biology - Xth Grade>How do Organisms Reproduce?>Introduction to Reproduction in Organisms

Describe briefly the biological effects of light on animal reproduction.

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Biology>Biology - Xth Grade>How do Organisms Reproduce?>Introduction to Reproduction in Organisms

Define ecosystem.

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Biology>Biology - Xth Grade>How do Organisms Reproduce?>Introduction to Reproduction in Organisms

The term Ecology was coined by ___.

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Biology>Biology - Xth Grade>How do Organisms Reproduce?>Introduction to Reproduction in Organisms

The amount of nutrients, such as carbon, nitrogen, phosphorus and calcium present in the soil at any given time, is referred as:

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Biology>Biology - Xth Grade>How do Organisms Reproduce?>Introduction to Reproduction in Organisms

What are the surroundings in which organisms live called?

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Biology>Biology - Xth Grade>How do Organisms Reproduce?>Introduction to Reproduction in Organisms

What is ecosystem? Discuss its different components with specific example of pond as an ecosystem.

MEDIUM

Biology>Biology - Xth Grade>How do Organisms Reproduce?>Introduction to Reproduction in Organisms

Assertion

(A)

: In brackish water, stenohaline animals are abundant
Reason

(R)

: Brackish water animals can withstand wide fluctuations in salinity

MEDIUM

Biology>Biology - Xth Grade>How do Organisms Reproduce?>Introduction to Reproduction in Organisms

Give a reason for the following.

The equilibrium of a forest ecosystem can be disturbed by the uncontrolled hunting of big predators.

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Biology>Biology - Xth Grade>How do Organisms Reproduce?>Introduction to Reproduction in Organisms

Mention four 'Evil Quartet' which cause depletion of biodiversity.

MEDIUM

Biology>Biology - Xth Grade>How do Organisms Reproduce?>Introduction to Reproduction in Organisms

Identify the elements which lead to much variation in the physical and chemical conditions of different habitats.
a) Only components such as Temperature, water, light and soil.
b) Only components such as pathogens, parasites, predators and competitors of the organism with which they interact constantly.
c) The physiology and anatomy of organisms
d) Both a and b

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Biology>Biology - Xth Grade>How do Organisms Reproduce?>Introduction to Reproduction in Organisms

Who proposed that ecosystem is the symbol of structure and function of nature?

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Biology>Biology - Xth Grade>How do Organisms Reproduce?>Introduction to Reproduction in Organisms

In an ecosystem, each organism occupies a particular place and has a functional role and it is known as

HARD

Biology>Biology - Xth Grade>How do Organisms Reproduce?>Introduction to Reproduction in Organisms

What is the size of animals belonging to mesofauna?

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Biology>Biology - Xth Grade>How do Organisms Reproduce?>Introduction to Reproduction in Organisms

With reference to temperature adaptations, identify $A, B, C$ of the following graph