(a) Write the reaction that occurs when glucose breaks down anaerobically in yeast.
(b) Write the mechanism by which fishes breath in water.
(c) Name the balloon like structures present in lungs. List its two functions.
(d) Name the respiratory pigment and write its role in human beings.

Name the balloon like structure present in the lungs. List its two functions.

Compound X and aluminium are used to join railway tracks. (a) Identify the compound X (b) Name the reaction (c) Write down its reaction.

Compound X and aluminium are used to join railway tracks. (a) Identify the compound X (b) Name the reaction (c) Write down its reaction.

(i) Write structural formula of the compound formed when one mole of ethyne reacts with one mole of hydrogen gas. (ii)Name the catalyst used in the above reaction. (iii) Write temperature at which the reaction mentioned in (a) occurs. (iv) Name the reaction.

Write the reactions of D-glucose which can't be explained by its open chain structure. How can cyclic structure of glucose explain these reactions?

Write the reactions of D-glucose which can't be explained by its open chain structure. How can cyclic structure of glucose explain these reactions?

(a) Name the organ that produces sperms as well as secretes a hormone in human males. Name the hormone it secretes and write its functions. (b) Name the parts of the human female reproductive system where fertilization occurs. (c) Explain how the developing embryo gets nourishment inside the mother's body.

(a) Name the organ that produces sperms as well as secretes a hormone in human males. Name the hormone it secretes and write its functions. (b) Name the parts of the human female reproductive system where fertilization occurs. (c) Explain how the developing embryo gets nourishment inside the mother's body.