note book work of bio for chapter life processes

Questions on nutrition

1. Why is small intestine  in herbivores longer than in carnivores?

2. What will happen if mucus is not secreted by the gastric glands?

 3. What is the significance of emulsification of fats?

 4. What causes movement of food inside the alimentary canal?

 5. Why does absorption of digested food occur mainly in the small intestine?

5 marks

1. Explain the process of nutrition in Amoeba.

2. Describe the alimentary canal of man.

3 Draw the diagram of alimentary canal of man and label the following parts. Mouth,  Oesophagus, Stomach, Intestine .

 4.How do carbohydrates, proteins and fats get digested in human beings?

Questions on respiration

1. “All plants give out oxygen during day and carbon dioxide during night”. Do you agree with this statement? Give reason.
2. Why do fishes die when taken out of water?

3. How does aerobic respiration differ from anaerobic respiration?

 4.Why is the rate of breathing in aquatic organisms much faster than in terrestrial organisms?

5. Name the energy currency in the living organisms. When and where is it produced?

Long answer

1.       Explain the three pathways of breakdown in living organisms.

Questions on circulatory system

Short answer 2 mark

1. Differentiate between an artery and a vein.

2. Why is blood circulation in human heart called double circulation?

 3. What is the advantage of having four chambered heart? Why do veins have thin walls as compared to arteries?

 4. What will happen if platelets were absent in the blood?

Long answer

1.       Describe the flow of blood through the heart of human beings.

Questions on transportation in plants and excretion

2 marks

1. Why and how does water enter continuously into the root xylem?

2. Why is transpiration important for plants?

3. How do leaves of plants help in excretion?

4. What is translocation? Which part of plant help in that?

5         marks 

1.. Describe the process of urine formation in kidneys.