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प्रश्न
Answer the following in short.
List five waste products of plants.
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उत्तर
Tannins, resins, latex, gums, essential oils, caffeine, quinine, morphine, etc.
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संबंधित प्रश्न
The diagram given below shows the male urinogenital system of a human being. Study the diagram and answer the questions that follow:
(i) Label the parts numbered 1 to 8.
(ii) Name the corresponding structure of part (4) in female reproductive system.
(iii) What is the role of part 7?
A dialysis machine contains long tubes coiled in a tank containing dialysing solution:
What does the dialysing solution contain?
Describe the mechanism of urine formation in human excretory system. Draw a labelled diagram to illustrate your answer.
Why is excretion necessary in living beings?
Name the following:
The part of kidney tubules where the term urine is first used for the fluid in it.
Define the following term:
Micturition
Given below is a simplified diagram of the human kidney cut open longitudinally. Answer the questions that follow.
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- Define excretion.
- Why does the cortex of the kidney show a dotted appearance?
- Why does the medulla of the kidney show a striped appearance?
- Write two differences in the composition of the blood flowing through the blood vessels 'A' and 'B'.
The following diagram represents a mammalian kidney tubule (nephron) and its blood supply.
Parts indicated by the guidelines 1to 8 are as follows:
1. Afferent arteriole from renal artery
2. Efferent arteriole
3. Bowman's capsule
4. Glomerulus
5. Proximal convoluted tubule with blood capillaries
6. Distal convoluted tubule with blood capillaries
7. Collecting tubule
8. U-shaped loop of Henle
Study the diagram and answer the question that follow:
Which structure contains the lowest concentration of urea?
Identify the correct labels for A and B in the following diagram
Give two examples of the following:
Main excretory organs
