Q2. (a) Explain how fertilizers are different from manure. (b) What would you choose between manure and fertilizer to provide nourishment in your field and why? Q3. Why do plant cells have an additional layer surrounding the cell membrane? What is this layer known as? Q4. (a) Name two diseases that are caused by virus. (b) Write one important characteristic of virus. Q5. PVC (polyvinyl chloride) is a thermoplastic and is used for making toys, chappals, etc. Bakelite is a thermosetting plastic and is used for making electrical switches, handles of various utensils, etc. Write the major difference between these two types of plastics?

Q2. (a) Explain how fertilizers are different from manure. (b) What

1.	Q2. (a) Explain how fertilizers are different from manure. (b) What would you choose between manure and fertilizer to provide nourishment in your field and why? Q3. Why do plant cells have an additional layer surrounding the cell membrane? What is this layer known as? Q4. (a) Name two diseases that are caused by virus. (b) Write one important characteristic of virus. Q5. PVC (polyvinyl chloride) is a thermoplastic and is used for making toys, chappals, etc. Bakelite is a thermosetting plastic and is used for making electrical switches, handles of various utensils, etc. Write the major difference between these two types of plastics?
Answer» Manure- They are organ and are made in fields using cow DUNG. They contain high amount of humus.Fertilizers- They are inorganic SALT and can also DEGRADE the soil. They contain high amount of plant nutrients and don't PROVIDE humus to the soil

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