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Practice Questions: Life Process - 2 - Science Class 10
Excretion In Plants
Fill in the blank
1. Plants get rid of excess water by ........................2. ........................ and water are produced as wastes during respiration by plants.
3. ........................ is produced as a waste during photosynthesis.
4. The gaseous wastes of respiration and photosynthesis in plants are removed through the .................... in leaves and ....................... in stem and released to the air.
5. The plants excrete CO2 produced as a waste during .................. process in night time.
6. Gums and resins are the ...................... products of plant.
7. The phenomenon of removal of waste products from the body is known as ......................
8. Leaves of ...................... contain essential oils.
9. ...................... are found in stem of conifers as waste product.
10. Aquatic plants lose most of their metabolic wastes by ...................... process.
Ans. 1. transpiration
2. CO2
3. Oxygen
4. stomata; lenticels
5. respiration
6. waste
7. excretion
8. tulsi/lemon
9. Resins
10. diffusion
Match the Column
Match the items of Column A with items of Column B.
Column A Column B
(A) Waste product of respiration (i) Resin
(B) Waste product of photosynthesis (ii) CO2
(C) Leaves of lemon (iii) essential oil
(D) Stem of conifers (iv) O2
Ans. A - (ii)
B - (iv)
C - (iii)
D - (i)
The document Practice Questions: Life Process - 2 | Science Class 10 is a part of the Class 10 Course Science Class 10.
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FAQs on Practice Questions: Life Process - 2 - Science Class 10
| 1. What is excretion in plants? |  |
Ans. Excretion in plants is the process by which plants eliminate waste materials and toxic substances from their body. This helps them maintain a healthy cellular environment and proper functioning of various metabolic processes.
| 2. How do plants excrete waste materials? | |
Ans. Plants excrete waste materials through various mechanisms. Some waste products, such as excess water and oxygen, are released through stomata during transpiration. Other waste products, such as metabolic byproducts and toxic substances, are stored in specialized plant structures like vacuoles or are deposited in the form of crystals in leaves or bark.
| 3. What are the waste products excreted by plants? | |
Ans. Plants excrete various waste products, including excess water, oxygen, carbon dioxide, and metabolic byproducts like urea. They also excrete toxic substances such as alkaloids and tannins, which are produced as a defense mechanism against herbivores.
| 4. Why is excretion important for plants? | |
Ans. Excretion is important for plants as it helps maintain the balance of essential substances and eliminates harmful waste materials. It ensures the proper functioning of metabolic processes, prevents the accumulation of toxic substances, and helps plants adapt to changing environmental conditions.
| 5. How does excretion contribute to the overall growth and development of plants? | |
Ans. Excretion plays a crucial role in the overall growth and development of plants. By eliminating waste products and toxic substances, it helps maintain a healthy cellular environment, ensuring optimal nutrient uptake and utilization. This, in turn, promotes healthy growth, efficient photosynthesis, and proper development of various plant organs and tissues.
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