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प्रश्न
The radio labelled carbon in carbon dioxide supplied to potato plants in an experiment was seen in the tuber eventually. Trace the movement of the labelled carbon dioxide.
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उत्तर
To observe the following movement of starch and the creation of carbohydrates from various parts of the plant to the others, the radiolabeled carbon dioxide is supplied. Leaves perform photosynthesis; the radioactive carbon dioxide is received by the leaves.
Following the photosynthesis process, carbohydrates in the leaves are the radioactive carbon. The presence of starch which is the by-product of photosynthesis is also proved. The carbohydrates transform into starch and are moved to the other organs to store. Hence, in the tubers, there are radioactive carbons, such as starch present in tubers.
Leaves →Phloem in veins→ Phloem in stem→ Tuber
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संबंधित प्रश्न
An apparatus, as shown below, was set up to investigate a physiological process in plants. The setup was kept in sunlight for two hours. Droplets of water were then seen inside the bell jar. Answer the questions that follow:
- Name the process being studied.
- Explain the process named above in Q.3(a)(i).
- Why was the pot covered with a plastic sheet?
- Suggest a suitable control for this experiment.
- Mention two ways in which this process is beneficial to plants.
- List three adaptations in plants to reduce the above mentioned process.
Under what conditions do plant transpire more quickly?
State whether the following statement is true or false. Rewrite the false statement correctly.
Transpiration is the loss of water from the roots of the plant.
State whether the following statement is true or false. Rewrite the false statement correctly.
Transpiration cools the plant when it is hot outside.
Fill in the blank with the suitable term given below:
Transpiration is more when the wind is blowing _____.
Multiple choice question. Tick (✓) the correct choice:
The loss of water through the stomata of leaves is called
(a) transpiration
(b) wilting
(c) evaporation
(d) osmosis
How does transpiration help in the uptake of water from the soil?
Give suitable explanation for the following:
Cork and bark of trees help in preventing loss of water
The diagram given alongside is an apparatus used to study a particular phenomenon in plants.
(i) Name the apparatus.
(ii) What is it used for?
(iii) What is the role played by the air bubble in this experiment?
(iv) Of what use is the reservoir?
A well watered healthy potted plant with variegated leaves was kept in darkness for about 24 hours. It was then set up as shown in the diagram and exposed to light for about 12 hours. At the end of this time, leaf x and y were tested for starch. Study the diagram and answer the questions that follow:
(i) Why was the plant initially kept in darkness for 24 hours?
(ii) What is the function of sodium hydroxide solution in the flask?
(iii) Select the correct leaf from the five available choices shown in the diagram as a, b, c, d and e. Rewrite the correct answer by filling in the appropriate letter for the questions that follow:
1. After the starch test, leaf x would look like ______.
2. After the starch test, leaf y would look like ______.
(iv) The experiment with leaf y shows that photosynthesis requires the presence of certain factors. Mention any one factor.
What type of transpiration is possible in the xerophyte Opuntia?
______ involves evaporative loss of water from aerial parts.
Identify the wrong statement and correct it.
Leaves perform the function of transpiration only.
Do different species of plants growing in the same area show the same rate of transpiration at a particular time? Justify your answer.
Briefly describe the following:
Angina Pectoris
Enlist different advantages of transpiration.
Name the structures through which Transpiration occur in a plant.
(a) State whether the following statement are True or False.
(b) Rewrite the false statement in the correct form by changing either the first or the last word only.
Transpiration helps to cool the body of the plant.
