Why do organisms live in certain places ?

Why do organisms live in certain places ?
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Think of that, the temperature difference in the desert is huge. So in order to survive, the cactus plant reduces heat gain and heat loss as well as water loss. (E.g. narrow pin shaped leaves, long extensive roots)   
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Description : the leaves are dying in certain places

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What is the general term for organisms that live in the soil and fallen leaves on the forest floor?

Description : What is the general term for organisms that live in the soil and fallen leaves on the forest floor?

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Description : The sum total condition in which organisms live is called as

Last Answer : Ans. Environment

Niche is (a) all the biological factors in the organism’s environment (b) the physical space where an organism lives (c) the range of temperature that the organism needs to live (d) the functional role played by the organism where it lives.

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Last Answer : (d) the functional role played by the organism where it lives.

There are five concentric layers within the atmosphere which is differentiated on the basis of temperature. The atmospheric layer which lies close to the earth's surface in which human being along with other organisms live is called troposphere. The rate at which air temperature in the troposphere gradually decreases with height is about __________ °C/km. (A) 0.05 (B) 1 (C) 6.5 (D) 15

Description : There are five concentric layers within the atmosphere which is differentiated on the basis of temperature. The atmospheric layer which lies close to the earth's surface in which human being along with other organisms live is called ... is about __________ °C/km. (A) 0.05 (B) 1 (C) 6.5 (D) 15

Last Answer : (C) 6.5

Which term is used to describe organisms which live on or in the bottom of an ocean or lake. Such organisms can be found anywhere from the shoreline to the greatest ocean depths? a) biota b) benthos c) nekton d) plankton

Description : Which term is used to describe organisms which live on or in the bottom of an ocean or lake. Such organisms can be found anywhere from the shoreline to the greatest ocean depths? a) biota b) benthos c) nekton d) plankton

Last Answer : ANSWER: B -- BENTHOS