Gaseous Exchange in Plants

Q. When glucose is administered orally, which process takes place first?

1. Circulation
2. Respiration
3. Excretion
4. Digestion

Q. In plants, gaseous exchange in plants occurs through the process of

1. Active transport
2. Diffusion
3. None of the above
4. Osmosis

Q. Plants carry out gas exchange through ___ .

1. Stomata
2. Lenticels
3. Mesophyll cells
4. Vascular system

Q. Identify the structure through which stomatal transpiration occures.

1. 
2. 
3. 

Q. Plants need not take up oxygen from atmosphere as cells in leaves produce all the necessary oxygen.

1. False
2. True

Q. Assertion: Plants can live without special respiratory organs.
Reason: Every living cell in the plant is present very close to the plant surface which facilitates easy exchange of gases. Also, oxygen availability is not an issue since oxygen is produced during photosynthesis.

1. Both assertion and reason are correct statements and reason is the correct explanation
2. Assertion is an incorrect statement but the reason is a correct statement
3. Both are incorrect statements
4. Both assertion and reason are correct statements but the reason is incorrect explanation

Q. What is the effect of carbon dioxide on the rate of respiration in plants?

1. Carbon dioxide has no effect on respiration rate
2. Rate of respiration in plants increases with increase in $C{O}_2$ concentration
3. Rate of respiration in plants decreases with increase in $C{O}_2$ concentration
   
4. Rate of respiration first increases then decreases with increase in $C{O}_2$ concentration
   

Q.

What is the difference between lenticels and stomata?

Q. In the process of respiration in plants 180g of glucose plus 192 g of oxygen produce ___________________.

1. 132 g of $C{O}_2$, 54 g of water and 343 Cal. of energy
2. 264 g of $C{O}_2$, 108 g of water and 686 Cal. of energy
3. 528 g of $C{O}_2$, 216 g of water and 1372 Cal. of energy
4. Large amount of $C{O}_2$, no water and no energy

Q. Which of the following gaseous exchange occurs in leaves of plant at the time of respiration?

1. Oxygen diffuses out.
2. Oxygen diffuses in.
3. Carbon dioxide diffuses out.
4. Carbon dioxide diffuses in.