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प्रश्न
Give biological reasons for the following statements : In some xerophytes leaves are modified into spines
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उत्तर
Xerophytes are plants growing in dry climate. It is important for them to conserve water. Leaves modified into spines reduce the surface area and thus reduce the rate of transpiration.
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संबंधित प्रश्न
A potted plant was taken in order to prove a factor necessary for photosynthesis. The potted plant was kept in the dark for 24 hours. One of the leaves was covered with black paper in the centre. The potted plant was then placed in sunlight for a few hours.
(i) What aspect of photosynthesis was being tested?
(ii) Why was the plant placed in the dark before beginning the experiment?
(iii) During the starch test, why was the leaf
(1) boiled in water
(2) boiled in methylated spirit
(iv) Write a balanced chemical equation to represent the process of photosynthesis.
(v) Draw a neat diagram of a chloroplast and label its parts.
Fill in the blank:
Xanthophyll is ______ coloured pigment.
Name the membrane that connects thylakoid of one granum With the other granum.
Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:
Leaves are broad and flat to increase the surface area for photosynthesis.
Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:
The dark reaction of Photosynthesis is light-independent.
Write the functional activity of the following structure:
Thylakoids
What are primary producers?
The minerals like nitrogen, potassium, and phosphorus, which are required in substantial quantity by the plants are called ______.
Label the diagram with the raw materials and products of photosynthesis.
