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प्रश्न
If a plant is releasing carbon dioxide and taking in oxygen during the day, does it mean that there is no photosynthesis occurring? Justify your answer.
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उत्तर
No, it does not mean that photosynthesis is not taking place. During the day, carbon dioxide released by plants during respiration is used up for photosynthesis, and some of the oxygen released during photosynthesis is used for respiration by the plants. Release of oxygen is a sign that photosynthesis is occurring in plant.
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संबंधित प्रश्न
State whether the statement is true or false:
Aquatic animals breathe at a slower rate than the terrestrial animals.
How are oxygen and carbon dioxide transported in human beings?
The breakdown of pyruvate to give carbon dioxide, water, and energy takes place in ______.
Trace the movement of oxygenated blood in the body.
What is the other name of wind-pipe?
Name the type of respiration in which the end product is:
Lactic acid
Give one example where such a respiration can occur.
State the three common features of all the respiratory organs like skin, gills and lungs.
From where do the aquatic animals and terrestrial animals obtain oxygen for breathing and respiration?
Why do fishes die when taken out of water?
Why is the rate of breathing in aquatic organisms much faster than in terrestrial organisms?
Describe the exchange of gases which takes place in the leaves of a plant
(a) during daytime, and (b) at night.
The two organisms which breath only through their moist skin are:
When a person breathes in the air, the air enters into his body through an organ A having two holes B in it. The air then passes through the pharynx and larynx and enters into tube C. The tube C divides into two smaller tubes D at its lower end. The two smaller tubes are attached to two respiratory organs E. Each smaller tube divides inside the organs E to form a large number of still smaller tubes called F. The smallest tubes F have air-sacs G at their ends in which gaseous exchange takes place in the body of the person. What are A, B, C, D, E, F, and G?
Veins and arteries carry blood. Which of these carry blood away from the heart?
Choose the odd one out in each of the following groups of four items each:
Oxyhaemoglobin, Carbaminohaemoglobin, Hypoxia, Carboxyhaemoglobin
Given below is an example of certain structure and its special functional activity:
"Kidney and excretion".
Fill in the blanks on a similar pattern.
Mitochondria and _____________.
Given below is an example of certain structure and its special functional activity:
"Kidney and excretion".
Fill in the blanks on a similar pattern.
'C' shaped cartilage rings and ____________.
How is the respiratory passage kept free of dust particles?
With regard to the respiratory system and the process of respiration in man, answer the following question:
What is meant by :
- Residual air and
- Dead air space
Explain the three pathways of breakdown in living organisms.
