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प्रश्न
Explain in your own words with suitable examples.
How is excretion in plants useful to human beings?
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उत्तर
Excretion in plants results in the production of various kinds of excreta which are waste for the plant but are equally important for human use.
The following examples are helpful in proving the above fact:
- Oxygen which is an excretory product of photosynthesis is an absolute requirement for human beings to survive on Earth.
- Tannin is a waste plant product which is stored in leaves and bark. it is used in making tea all over the world.
- Plants store waste products in their leaves and bark which are shed off regularly. These shed-offs are used to make manure.
- Gum and resin are waste materials for plants but they have various uses for man.
- Essential oils are also waste products of plants which are stored in their leaves. These essential oils are used for various purposes by us.
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संबंधित प्रश्न
The nephrons discharge their urine at ______.
Write the functions of the Urinary bladder
What is the role of glomerulus in the kidney?
Why do some people need to use a dialysis machine? What does the machine do?
The excretory unit in the human excretory system is called:
Put a tick mark (✓) against the most appropriate alternative in the following statement :
In human beings, urea is produced in :
Fill in the blank.
.................. produces bile pigments from the heamoglobin of broken RBCs.
Answer the following in short.
Define transpiration in plants.
In humans, urea is formed in
Name the following:
Functional unit of kidney.
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 highest concentration of urea?
Given below is a highly simplified diagram of the human kidney cut open longitudinally. Answer the question that follow:
Mention two functions of the kidney.
Study the diagram given alongside and then answer the question that follow:
Name the stages involved in the formation of urine.
Answer the following question:
Explain the human excretory system with the help of a suitable diagram.
Name the Following
The blood vessels which brings pure blood to the kidneys:
State the Location: Renal pyramids
Choose the Odd One Out:
Bilirubin and Biliverdin are pigments which are ____________.
Two green plants are kept separately in oxygen-free containers, one in the dark and the other in continuous light. Which one will live longer? Give reasons.
The main nitrogenous waste formed in the human body:
