A physical structure that is characteristic of each type of ecosystem is due to:

1.  Interaction between various biotic components of the ecosystem
2.  Interaction between various abiotic components of the ecosystem
3.  Interaction between various biotic and abiotic components of the ecosystem
4.   Interaction of producers with abiotic components of the ecosystem

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Organisms that are capable of conversion of inorganic material into organic material with the help of the radiant energy of the sun include:

I:  Plants
II:  Photosynthetic bacteria
III:  Chemosynthetic bacteria

 

1. I only 2. I and II only
3. I and III only 4. I, II, and III
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Stratification of an ecosystem means:

1.  Vertical distribution of different species occupying different levels
2.  Vertical distribution of different species occupying the same levels
3.  Horizontal distribution of different species occupying different levels
4.  Horizontal distribution of different species occupying the same levels
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The best way to describe an ecosystem would be that they are:

1.  processors of energy and transformers of matter.
2.  processors of matter and transformers of energy.
3.  processors of matter and energy.
4.  transformers of matter but not of energy.

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