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प्रश्न
On a very cold morning, Boojho and Paheli were talking with each other as they walked down to their school. They observed that the air coming out of their mouth looked like smoke. They were amused and wondered how it happened. Help them find the answer.
उत्तर
On a cold day, the warm and moist air exhaled by us condenses into mist when it comes in contact with the cold air of the atmosphere. This looks like white smoke.
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संबंधित प्रश्न
Carbon dioxide enters into the leaves through tiny pores present on the surface of the leaf called _________.
(a) chlorophyll
(b) chloroplast
(c) stomata
(d) epidermis
Name the pores in a leaf through which respiratory exchange of gases takes place.
Fill in the Following Blank with Suitable Word.
_________ In the Lungs Provide a Very Large Surface Area for Gaseous Exchange.
Name the type of respiration in which the end product is:
C2H5OH and CO2
Give one example where such a respiration can occur.
Which of the following is not produced during anaerobic respiration in unicellular fungus?
During respiration, the exchange of gases takes place in:
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 |
Internal respiration may be defined as:
Which of the following statements are correct?
(i) pyruvate can be converted into ethanol and carbon dioxide by yeast
(ii) fermentation takes place in the case of aerobic bacteria
(iii) fermentation takes place in mitochondria
(iv) fermentation is a form of anaerobic respiration
One of the following animals does not use tracheae as the respiratory organs. This animal is:
One of the following organisms does not depend on the simple diffusion of gases for breathing and respiration. This organism is:
Veins and arteries carry blood. Which of these carry blood away from the heart?
Answer this question.
What are the holes on the sides of the body of insects called?
Differentiate between
External respiration and Internal respiration
What is the normal percentage composition of gases in inspired and expired air respectively?
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 a certain structure and its special functional activity:
"Kidney and excretion".
Fill in the blanks on a similar pattern.
Pleura and _____________.
Give Suitable Explanation for the Following :
Why do you shiver and why do your teeth chatter when it is very cold in winter?
With which of the following haemoglobin combines to form carboxyhaemoglobin?
____________ is necessary for the respiration in plant.
