Advertisements
Advertisements
प्रश्न
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.
Why was the plant kept in the dark before the experiment?
Advertisements
उत्तर
Destarching ensures that any starch present after the experiment has been formed under experimental conditions. Therefore, the plant was kept in the dark before the experiment.
संबंधित प्रश्न
Fig. demonstrates a physiological process taking place in green plants. The whole set-up was placed in bright sunlight for several hours. Study the diagram and answer the questions that follow:
- What aspect of the physiological process is being examined?
- Explain the physiological process mentioned in (a) above.
- Label the parts numbered 1 and 2 in the diagram.
- Write a well-balanced chemical equation for the physiological process explained in (b) above.
- What would happen to the rate of bubbling of the gas if a pinch of sodium bicarbonate is added to the water in the beaker? Explain your answer.
Expand the following biological abbreviations :
ATP
The specific function of light energy in the process of photosynthesis is to
How do non-green plants such as fungi and bacteria obtain their nourishment?
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.
Fill in the blank by rearranging the letter in the bracket.
Pigment involved in the food synthesis is _________ (phllylochor).
Name the plant part
- Which bends in the direction of gravity but away from the light.
- Which bends towards light but away from the force of gravity.
The minerals like nitrogen, potassium, and phosphorus, which are required in substantial quantity by the plants are called ______.
What is the end product of photosynthesis?
Assertion (A): All food chains begin with herbivores.
Reason (R): Green plants are heterotrophs.
