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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
State the main functions of the following:
Cytokinins
Define the following:
Quantum
Distinguish between the following:
Photosynthesis and photophosphorylation.
The figure given below represents the vertical section of a leaf.
( i) Name the parts labeled 1 to 5.
( ii ) What do the two arrows (dotted and solid) indicate in the daytime and at night?
( iii) Could you add one more arrow in the figure? If yes, what for?
( iv) How many leaf veins have been shown in this section?
The following statement is about photosynthesis in a green plant. Write whether it is True or False.
The raw materials for photosynthesis include water and carbon dioxide.
Fill in the blanks:
The end products of photosynthesis are ______ and ______.
Complete the following by filling in the blanks numbered 1 to 10 with the appropriate word/term:
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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?
Choose the correct answer:
The process of photosynthesis occurs by _________
Are the following statement true or false? Give reason in support of your answer.
The starting point of carbon cycle is the release of carbon dioxide by animals during respiration.
Oxygen given out during photosynthesis comes from water. Explain this statement.
Photosynthesis is considered as a process supporting all life on earth.
Complete the following sentence with appropriate word:
AIIP stands for ____________.
Complete the following sentence with appropriate word:
A dark reaction is a __________ reaction.
Write the functional activity of the following structure:
Thylakoids
Choose the correct option.
In presence of high concentration of oxygen, RuBP carboxylase converts RuBP to ______.
What will happen if you breathe through mouth?
Plants utilize only ______% of the absorbed water for photosynthesis and the other activities.
Define photosynthesis.
