Question

9/16 अभिकथन : श्वासनली में उपास्थि के छल्ले मौजूद होते हैं।
कारण : ये सुनिश्चित करते हैं कि वायु-मार्ग का पतन न हो। (1)​

Answer 1

Take a beaker (jar or jug) with some water and put some drops of red or blue ink in it

Take a tender twig of any flowery plant with leaves and flowers, preferably white flowers, and

put it in the beaker for 6 to 8 hours. What do you observe? For further examination cut across

its stem ard look for the presence of colored water.