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प्रश्न
Give biological reasons for the following statements : In some xerophytes leaves are modified into spines
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
Given below is an experiment setup to demonstrate a particualr tropic movement in germinating seeds. Study the diagram and answer the questions that follow : 
What is meant by ‘Positive’ and ‘Negative’ tropic movements in plants?
Distinguish between the following:
Photosynthesis and photophosphorylation.
Name the following:
Three organisms that cannot prepare their own food by photosynthesis.
Fill in the blanks:
The end products of photosynthesis are ______ and ______.
Choose the correct answer:
Which one of the following is the best reason for leaving a plant in a dark place before carrying out experiments on photosynthesis?
Name the following:
The first form of food substance produced during photosynthesis.
Mention one difference between the following on the basis of what is given in bracket.
Respiration and photosynthesis (gas released)
Complete the following food chains by writing the names of appropriate organisms in the blanks:
______ → Mouse ______ → Peacock
Photosynthesis in green plants is directly and indirectly dependent on so many plant structures.
Explain briefly the role of the following structures in this process is Stomata.
Write an experiment to demonstrate that CO2 is necessary for photosynthesis.
Name the following:
The immediate product of photosynthesis.
Give technical term:
In photosynthesis radiant energy is converted into which from?
Choose the Odd One Out
Choose the Correct Answer:
Which one of the following would not be a limiting factor for photosynthesis?
Fill in the blank by rearranging the letter in the bracket.
Pigment involved in the food synthesis is _________ (phllylochor).
______ is ATP factory of the cells.
Where does the carbon that is used in photosynthesis come from?
The role of chlorophyll is to absorb light from the sun.
When iodine solution is added for testing starch, part of the leaf with ______ turns a blue-black color.
Draw the structure of the stomata and label the parts.
