1. Answer the following questions in 10–20 words: (2 marks)a) Mehaa filled a container with dough and added yeast to it. She kept it aside for a fewdays. Write down the reaction that will take place in the container.b) How does the diaphragm move during inhalation?2. Choose the correct option: (2 marks)a) The primary function of enzymes in the saliva is to convert:(i) fats into fatty acids and glycerol (ii) starch into simple sugars(iii) proteins into amino acids (iv) complex sugars into simple sugarsb) The cell membrane of an amoeba changes its shape to trap food. What are thesestructures called?(i) cud (ii) vacuole(iii) pseudopodia (iv) cell wall3. Answer the following questions in 30–40 words: (8 marks)a) Rahul placed his potted plant in a dark room. A few days later, he noticed that theplant had died. Why do you think this happened?b) Describe two differences between the digestive system of grass-eating animals andhumans.c) Adi measured his breaths per minute when at rest and when playing football, asshown below. Why does the number of breaths per minute change?d) Distinguish between aerobic and anaerobic respiration.​