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प्रश्न
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.
पर्याय
True
False
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उत्तर
False
There is no start point or end point in the carbon cycle, the carbon is constantly circulated between the atmosphere and the living organisms.
संबंधित प्रश्न
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.
Mention one difference between the following on the basis of what is given in bracket.
Producers and consumers (mode of nutrition)
Identify the false statement and rewrite it correctly by changing the first or last word only.
Green plants are consumers.
Complete the following food chains by writing the names of appropriate organisms in the blanks:
Grass → ______ → Snake → ______
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?
Complete the following sentence with appropriate word:
4OH ——> _____ + O2
Choose the correct option.
For fixing one molecule of CO2 in Calvin cycle _______ are required.
The swollen basal part of the ______ pistil is the which bears the ______.
What is the end product of photosynthesis?
1. What happens to the dandelion flower
- During the daytime?
- At night?
2. What is the phenomenon known as?
