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प्रश्न
Explain the Term
Lenticel
उत्तर
Lenticel: A pore in the periderm of a woody stem. It acts as an organ of gaseous exchange.
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संबंधित प्रश्न
State whether the following statement is true or false. Rewrite the false statement correctly.
During transpiration, the leaves lose more water from their upper surface.
Answer the following (only in few words);
Where does transpiration take place in leaves? Give names of the various parts.
Choose the correct answer:
In herbaceous plants, following percentage of absorbed water comes out __________
What is meant by the term transpiration stream?
Give Reasons for the following:
Forest bring in the rain, transpiration is the cause.
The following diagram is set up to demonstrate an experiment.
Five plants A, B, C, D, and E were placed in a beaker containing water. The water in each beaker was covered with a layer of oil. The leaves were removed from plant D in plant B, upper surfaces of all the leaves were covered with Vaseline, in-plant C the lower surfaces of all the leaves were covered with Vaseline and plant E was exposed to strong light. The beakers were then left for a few hours and at the end of the experimental period, weights of each beaker were taken.
Write the correct answer out of the five available choices given under each question:
I. In which beaker would you expect the greatest decrease in weight?
(i) A (ii) B (iii) C (iv) D (v) E
II. In which beaker the change of weight would be minimum?
(i) A (ii) B (iii) C (iv) D (v) E
III. Which plant would remain healthy for a longer period of time?
(i) A (ii) B (iii) C (iv) D (v) E
IV. In this experiment which plant can be considered as the uncontrolled one?
(I) A (ii) B (iii) C (iv) D (v) E
V. The difference of weight would b maximum between:
(i) A and B (ii) A and C (iii) A and D (iv) A and E (v) D and E
Name the following:
Holes present on the surface of the stems and twigs for transpiration.
Mark the most appropriate answer in the following:
In hot summer days, plant cooling is due to :
