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Could anyone please define stimuli/stimulus and excretion? 

Stimuli – The changes in the environment (external or internal) to which the organism respond and react are called stimuli. The response of an organism to these stimuli is in form of certain body movement.

Excretion – The process of removal of toxic waste (mainly nitrogenous) produced as a by- product in metabolism from the body of an organism is known as excretion.

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 Stimuli: A thing or event that evokes a specific functional reaction in an organ or tissue: "areas of the brain which respond to auditory stimuli"

 

 

 

 

 

 

 

 

 

 

 

 

 

Excretion: Excretion is the process by which waste products of metabolism and other non-useful materials are eliminated from an organism.


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Stimuli : A thing or event that evokes a specific functional reaction in an organ or tissue: "areas of the brain which respond to auditory stimuli"

 

 

 

 

 

 

 

 

 

 

 

 

 

Excretion: Excretion is the process by which waste products of metabolism and other non- useful materials are eliminated from an organism.

 

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 excereation - Excretion is the process by which waste products of metabolism and other non-useful materials are eliminated from an organism. This is primarily carried out by the lungs, kidneys and skin.[1]

stimuli - 

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