Revision questions for classX

LIFE PROCESSES

1.       How do we tell the difference between what is alive and what is not?

2.       Is the invisible molecular movement necessary for life?

3.       Why are molecular movements needed for life?

4.       What are life processes?

5.       Life on earth depends on ----------------------based molecules.

6.       Most chemical reactions in body are -------------------

7.       Simple diffusion is not enough for multicellular organisms.

8.       Why do we need transportation system?

9.       Give two examples of autotrophs and heterotrophs. Also bring out the differences between the two modes of nutrition.

10.   State the function of biocatalysts.

11.   Define photosynthesis and write a balanced equation for it.

12.   Name the internal energy reserve in plants and animals.

13.   Explain the events that occur during photosynthesis.

14.   How do desert plants photosynthesise?

15.   Give two examples of variegated leaves.

16.   State two functions of stomata. How is opening and closing of stomata regulated? Draw a well labelled diagram.

17.   How do plants obtain other raw materials?

18.   What are the green dots in a leaf cell

19.   Give two examples of parasites and saprophytes each.

20.   Comment: Form of nutrition differs depending on the type and availability of food material.

21.   Explain nutrition in amoeba.

22.   What is the difference in which food is obtained by amoeba and paramecium?

23.   Activity 6.3

24.   Discuss the digestion of food in mouth.

25.   Define peristalsis. Does peristalsis occur only in oesophagus?

26.   Explain digestion of food in stomach.

27.   State the function of HCl and mucus in stomach.

28.   What is acidity?

29.   Why do herbivores have longer small intestine?

30.   Small intestine is the site of complete digestion of carbohydrates, proteins and fats.

31.   What is a villus? What is its function? Or How is small intestine designed to absorb digested food?

32.   What is dental caries?

33.   Activity 6.5

34.   What are the various ways in which glucose is broken down?

35.   State the function of ATP. How much energy is released when one terminal phosphate of ATP is broken?

36.   Why do aquatic organisms have higher breathing rates?

37.   List the characteristics of respiratory surface.

38.   Why is nasal breathing better than mouth breathing?

39.   Draw the diagram of respiratory system.

40.   Explain how breathing takes place.

41.   How is oxygen and carbon dioxide transported?

42.   How are lungs designed in human beings to maximise the area for exchange of gases.

43.   State the amount of Hb in men and women