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प्रश्न
Complete the following statement by choosing the correct alternative given below :
All animals would die on the earth if there was no ______.
पर्याय
chlorophyll
haemoglobin
penicillin
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उत्तर
All animals would die on the earth if there was no Chlorophyll.
APPEARS IN
संबंधित प्रश्न
Name the following:
The main mineral constituent of chlorophyll.
The diagram alongside refers to an experiment in which the apparatus was set up with the light source 10 cm away from the plant. After 15 minutes the number of bubbles evolved per minute from the cut stem was recorded. The light source was moved to 20 cm away from the plant, left for 15 minutes and the number of bubbles evolved per minute was again recorded. The experiment was repeated with the light source at distances of 40, 60, 80 and 100 cm away from the plant. Plot a graph for the results obtained and answer the following questions.
(i) From the graph it seems likely that the rate of bubbling per minute at 50 cm would have been
(a) 2.0 (b) 2.5 (c) 3.0 (d) 3.5
(ii) The gas produced by the plant during the experiment was
(a) air (b) oxygen (c) carbon dioxide (d) nitrogen (e) hydrogen
(iii) The gas collected comes due to the breakdown of
(a) glucose (b) starch (c) water (d) air (e) ATP
(iv) If ice cubes were added to the water, the rate of bubble formation would
(a) Stay the same.
(b) Increase because more water is added.
(c) Decrease because the temperature drops.
(d) Decrease because water freezes.
(e) Cannot tell from the information given.
(v) If some sodium bicarbonate is added to the water the rate of bubble formation
(a) Increases because more respiration occurs.
(b) Increases because more photosynthesis occurs.
(c) Increases because the gas becomes less soluble.
(d) Decreases because carbon dioxide acts as a limiting factor.
(e) Decreases because respiration decreases.
Name the following:
The source of carbon dioxide for aquatic plants.
All life owes its existence to chlorophyll. Give reason.
Given below is the representation of a certain phenomenon in nature. With four organisms 1-4.
Name any one organism that could be shown at No .5
Given alongside is the diagram of an experimental set-up:
Would you take any step before starting the experiment? Describe this step and explain its necessity.
Where are the chlorophyll pigments present in a cell?
Why Is Photosynthesis Important in Nature?
Give technical term:
Name the experiment to demonstrate the importance of light for photosynthesis.
Complete the following sentence with appropriate word:
________ are regarded as complete photosynthetic units of plants.
