1.

(a) State reason for the following : (i) Rings of cartilage are present in the trachea. (ii) Plants look green in colour. (b) Write other names of the following : (i) Alveolar sac (ii) Voice box

Answer» (a) State reason for the following :

(i) Rings of cartilage are present in the trachea.

(ii) Plants look green in colour.

(b) Write other names of the following :

(i) Alveolar sac

(ii) Voice box


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