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प्रश्न
Answer the following question.
Birds are uricotelic in nature. Give reason.
उत्तर
- Birds are capable of converting ammonia into uric acid by ‘inosinic acid pathway’ in their liver.
- Uric acid is least toxic and hence, it can be retained in the body for some time.
- It is least soluble water hence, negligible amount of water is required for its elimination.
- This mode of excretion can also help reduce body weight (an adaptation for flight) and those animals which need to conserve more water follow uricotelism.
Hence, in order to conserve water as an adaptation for flight, birds are uricotelic in nature.
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संबंधित प्रश्न
The diagram given below shows a section of human kidney. Study the diagram carefully and answer the questions that follow :
(i) Label the parts numbered 1 to 4.
(ii) Why does part ‘2’ have a striped appearance?
(iii) What is the fluid that passes down part ‘4’? Name the main nitrogenous waste present in it.
(iv) Mention the structural and functional units of kidneys.
(v) Name the two major steps in the formation of the fluid mentioned in Q.5 (a) (iii).
Correct the following statements by changing the underlined words:
The normal pale yellow colour of the urine is due to the presence of the pigment Melanin.
Name an animal which absorbs oxygen through its moist skin.
What do kidneys excrete?
Why do some people need to use a dialysis machine? What does the machine do?
Name the following:
Functional unit of kidney.
Write the functional activity of the following structure: Aldosterone
The habitat of animals that excrete nitrogenous waste in the form of urea.
The mode of excretion of nitrogenous wastes like ammonia which takes place by simple diffusion is called ______.
Give reason:
Excretion is a necessary process of our body.
