Why is it wrong to understand excretion only as removal of faeces?
Answer and explanation
Correct answer: Because excretion is the removal of metabolic wastes
Excretion is the removal of metabolic wastes produced inside cells, such as urea, excess salts, carbon dioxide, and extra water. The removal of undigested food from the alimentary canal is called egestion, not excretion. Kidneys filter blood and form urine containing nitrogenous wastes, while lungs remove carbon dioxide. Therefore option A gives the correct definition; the other options confuse processes or deny the kidney’s role.
Frequently asked questions
What is the correct answer to this question?
Because excretion is the removal of metabolic wastes
Why is this the correct answer?
Excretion is the removal of metabolic wastes produced inside cells, such as urea, excess salts, carbon dioxide, and extra water. The removal of undigested food from the alimentary canal is called egestion, not excretion. Kidneys filter blood and form urine containing nitrogenous wastes, while lungs remove carbon dioxide. Therefore option A gives the correct definition; the other options confuse processes or deny the kidney’s role.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Life Processes. Topic: Excretion.
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