Read the following statements (A-D) related to stratification in the forest ecosystem and select the correct option stating true (T) and false (F).

A. It is the horizontal distribution of different plant species.
B. Shrubs occupy the top strata.
C. It shows the different plant species occupying different levels in an ecosystem.
D. Grasses occupy the bottom layers in a forest ecosystem.

A - F, B - F, C - T, D - T

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A - F, B - T, C - F, D -T

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A - T, B - T, C - F, D - F

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A - T, B - F, C - T, D - F

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Solution

The correct option is A A - F, B - F, C - T, D - T
An ecosystem is a self-sustained stable unit formed by the interactions between the biotic (living) and abiotic (non-living) components that are comprised in it.

The interaction between biotic (living) and abiotic (non-living) components results in a physical structure that is characteristic of an ecosystem.

Stratification is a feature of the physical structure of an ecosystem.

It is the vertical distribution of different species occupying different levels in an ecosystem. ‘Strata’ in an ecosystem means ‘layers’.

Hence, statement A is false and statement C is true.

For example, in a forest ecosystem, the trees occupy the top vertical strata, shrubs occupy the second vertical strata and grasses occupy the bottom layers.

Hence, statement B is false and statement D is true.

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a. Carnivores occupy the second trophic level in the food chain.

b. The flow of nutrients in an ecosystem is considered to be a ‘one way’ transport.

c. Plants in an ecosystem are called primary consumers.

Q. The phenomenon in which the trees occupy the top vertical strata or layer of a forest, next shrubs and grasses occupy the bottom layers is known as .

Trees occupy the top vertical strata or layer of a forest, shrubs the second and herbs and grasses occupy the bottom layers. This phenomenon is called:

Q. How many of the following statements (A-D) are correct?

A. The species composition of an ecosystem is obtained by the identification and enumeration of plant species only
B. Vertical distribution of different species occupying different levels is called stratification
C. Producers are the heterotrophic components of an ecosystem
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(A) Vertical distribution of different species occupying different levels in a community is called stratification.
(B) Net primary productivity minus respiration losses is the gross primary productivity.
(C) Rate of biomass production is called decomposition
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