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Why is the Upper Surface of Broad Leaves Greener than Their Lower Surface? - Biology

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प्रश्न

Why is the upper surface of broad leaves greener than their lower surface?
टीपा लिहा

उत्तर

It is because the upper surfaces of broad leaves are directly exposed to sunlight which leads to maximize the rate of photosynthesis.

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पाठ 6: Photosynthesis - Exercise 2 [पृष्ठ ७५]

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फ्रँक Biology [English] Class 10 ICSE
पाठ 6 Photosynthesis
Exercise 2 | Q 8 | पृष्ठ ७५

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 :

(ii) Name the tropic movement shown by part 1. 


Define the following:

Quantum


Complete the following by filling in the blanks numbered 1 to 10 with the appropriate word/term:

Photosynthesis involves light reaction and dark reaction. During light reaction, the chlorophyll present in the (1) ______ gets activated by absorbing light energy. This energy splits (2) ______ molecules to (3) ______ and oxygen and releases two electrons. This process is called (4) ______. The (5) ______ ions are picked up by NADP to form (6) ______. The ADP is converted to (7) ______. This process is called (8) ______. During the dark phase, the compound produced at the end of the light reaction reacts with carbon dioxide to form (9) ______. This product is converted to starch. The process is called (10) ______.


Choose the correct answer:
Which of the following gas is used in photosynthesis?


The production of starch, and not glucose, is often used as a measure of photosynthesis in leaves because


The number of water molecules required in the chemical reactions to produce one molecule of glucose during photosynthesis is


The rate of photosynthesis is not affected by


Name the following:

The first form of food substance produced during photosynthesis. 


Name the following:

The tissue that transports manufactured type of starch from leaves to all parts of the plants.


A candidate studied the importance of certain factors in photosynthesis. He took a potted plant and kept in the dark for over 24 hours. In the early hours of the next morning, he covered one of the leaves with black paper in the centre only. Then he placed the plant in sunlight for a few hours and tested the leaf which was covered with black paper for starch.

Describe step by step, how the candidate proceeded to test the leaf for the presence of starch?


How do non-green plants such as fungi and bacteria obtain their nourishment?


Photosynthesis is considered as a process supporting all life on earth.


Respiration is said to be the reversal of photosynthesis.


The figure below represents the vertical section of a leaf:

(i) Name the parts 1 to 5.
(ii) How many veins have been shown?
(iii) State the functions of parts 4 and 5.


Complete the following sentence with appropriate word:

AIIP stands for ____________.


Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:

Radiant energy is converted into chemical energy by photosynthesis.


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.


Choose the Correct Answer:
NADP is expanded as


Choose the correct option.

For fixing one molecule of CO2 in Calvin cycle _______ are required.


What will happen if you breathe through mouth?


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