ASSIGNMENT CHAPTER- LIFE PROCESSES
1. What is the function of digestive enzymes?
2. What is the role of- a) HCl in stomach b) digestive enzymes c) saliva d) stomata e) peristalsis
3. Show the reduction taking place during photosynthesis with the help of a balanced chemical equation.
4. Why is diffusion insufficient to meet the oxygen requirements of multicellular organisms like humans?
5. Name the steps involved in holozoic nutrition.
6. Fill in the blanks:a) No digestion takes place in…………….
b) The other name for salivary amylase is ……………….
c) …………………stores the bile juice.
d) …………………….is the vestigial organ present in the digestive system.
e) Proteolytic enzyme present in stomach is………………………… f) Pepsin requires………………..medium for its action while trypsin requires………… medium.
g) Bile salts help in …………………..of fats.
h) ……………………is a fat digesting enzyme.
i) ……………………protects the wall lining from the secretion of HCl in stomach.
7. a) Label in the given diagram, the following parts :
Guard cells, stomatal pore, subsidiary cells.
b) What is the role of stomata?
c) Which ion helps in movement of water in stomata?
8.
Leaves of a potted plant are coated with Vaseline to block the stomata. Will this plant remain healthy for long? State the 3 reasons for your answer.