Q48. Define cells, cell membrane, nucleus and cytoplasm.
Q49. Distinguish between a parasite and a saprotroph.
Q50. Show with the help of a sketch that the plants are the ultimate source of food
Q51. Can we imagine life on earth in the absence of photosynthesis?
Q52. Draw a diagram showing photosynthesis.
Q53. Write a note on pitcher plant?
Q54. How nutrients are replenished in the soil?