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प्रश्न
Choose the Correct Answer:
Which would do maximum harm to a tree?
पर्याय
Loss of half of its branches
Loss of half of its flowers
Loss of all of its leaves
Loss of a little bark
उत्तर
Loss of all of its leaves
APPEARS IN
संबंधित प्रश्न
Cochlea, Malleus, Pinna, Stapes, Incus.
Give biological reasons for the following statements : In some xerophytes leaves are modified into spines
Give appropriate biological/technical terms for the following:
An apparatus that measures the rate of water uptake in a cut shoot due to transpiration.
The following diagram 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
(i) What aspect of the physiological process is being examined?
(ii) Explain the physiological process mentioned in (i) above.
(iii) Label the parts numbered 1 and 2 in the diagram.
(iv) Write a well-balanced chemical equation for the physiological process explained in (ii) above.
(v) 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.
A potted plant was taken in order to prove a factor necessary for photosynthesis. The potted plant was kept in the dark for 24 hours. One of the leaves was covered with black paper in the centre. The potted plant was then placed in sunlight for a few hours.
(i) What aspect of photosynthesis was being tested?
(ii) Why was the plant placed in the dark before beginning the experiment?
(iii) During the starch test, why was the leaf
(1) boiled in water
(2) boiled in methylated spirit
(iv) Write a balanced chemical equation to represent the process of photosynthesis.
(v) Draw a neat diagram of a chloroplast and label its parts.
Differentiate between the following pairs on the basis of what is indicated in the brackets.
Leaf and Liver [form in which glucose is stored]
Define the following:
Quantum
How does carbon dioxide return to the atmosphere? Explain.
A student in order to study the importance of certain factors of photosynthesis took a potted plant and kept it in the dark for over 24 hours. Then in the early hours of the morning the student covered one of the leaves with black paper in the centre only. Student placed the potted plant in the sunlight for a few hours, and then tested the leaf which was covered with black paper for starch.
(i) What aspect of photosynthesis was being investigated?
(ii) Is there any control in this experiment? If so, state the name.
(iii) Why was the plant kept in the dark before the experiment?
(iv) Describe step by step how the candidate proceeded to test the leaf for the presence of starch.
Name the following:
The tissue that transports manufactured type of starch from leaves to all parts of the plants.
Identify the false statement and rewrite it correctly by changing the first or last word only.
Green plants are consumers.
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?
How do non-green plants such as fungi and bacteria obtain their nourishment?
What is the law of limiting factors?
Explain the term Phosphorylation.
Name the following:
The process by which plants produce their food.
Complete the following sentence with appropriate word:
A light reaction is a ___________ reaction.
The green pigment present in the plant is ______.
During photosynthesis, plants exhale ______.
Guard cells of stomata are green but cannot photosynthesize? Give reason.
Assertion (A): All food chains begin with herbivores.
Reason (R): Green plants are heterotrophs.
