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प्रश्न
The photosynthesis in a plant is not taking place during the day time if the plant is releasing:
विकल्प
water vapour
oxygen
carbon dioxide
all the above
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उत्तर
Carbon dioxide
During daytime, the carbon dioxide produced through respiration is used up in photosynthesis by leaves. In fact, more carbon dioxide is taken in from the air for this purpose. So, oxygen is diffused out and carbon dioxide is diffused in.
Hence, if a plant is releasing carbon dioxide during the daytime, then photosynthesis is not taking place.
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संबंधित प्रश्न
Given below are the end products of different reactions involving glucose.
Write the reaction number in front of the following:
(i) Anaerobic reaction =
(ii) Reaction in the human muscles =
(iii) Aerobic respiration =
(iv) Reaction in the plant cells =
(v) Reaction in the liver
The mountaineers carry oxygen with them because ______.
Name the red pigment which carries oxygen in blood.
Fill in the following blank with suitable word:
The organs of respiration in man are the _____________.
Describe the process of respiration in the following part of a plant:
Leaves
What are the major organs of respiratory system in man (or humans)?
Why do the walls of trachea not collapse when there is less air in it?
Which of the following is correct for the process of anaerobic respiration?
| Carbon dioxide always produced | A lot of energy released | |
| (a) | No | Yes |
| (b) | No | No |
| (c) | Yes | No |
| (d) | Yes | Yes |
Out of xylem and phloem, which one carries materials upwards as well as downwards?
Differentiate between
External respiration and Internal respiration
Answer the following in detail.
Explain the process of Cellular Respiration.
Match the items in Column I with the ones most appropriate in Column II. Rewrite the matching pairs.
|
Column I |
Column II |
|
(a) Alveoli |
(i) where aerobic respiration takes place |
|
(b) Bronchioles |
(ii) lined with hair |
|
(c) Nasal Chamber |
(iii) diffusion of gases |
|
(d) Bronchi |
(iv) small air tubes |
|
(v) an inverted Y shaped tube |
|
|
(vi) a common passage for food and air |
Given below is an example of a certain structure and its special functional activity:
"Kidney and excretion".
Fill in the blanks on a similar pattern.
Pleura and _____________.
State one function of the following:
Ciliated epithelium lining the respiratory tract
Given below is an overall chemical reaction of a certain process:
C6H12O6→LacticAcid+2ATP+Heat energy
Is this reaction applicable to animals or to plants or to both animals and plants?
Draw a diagram of the human respiratory system and label - pharynx, trachea, lungs, diaphragm and alveolar sac on it.
Complete the analogy.
Transport of CO2 by plasma : 7% :: Transport of CO2 by bicarbonate ions: ____________.
Glycolysis process occurs in which part of the cell?
Which of the following is an incorrect statement?
Mark the following statement as True or False. Correct the false statement.
Exhaled air has more percentage of CO2 than inhaled air
