| (D) Describe the use of the agricultural labor authority. 6. (a) Make a nominal picture of angiosperm. (B) What is the genetic code? How does it work

What is the use of a filter pump ? How does it work?

What is a solar cell ? How does it work ? Write its one use.

(a) What is biogas ? Name the major component of biogas. (b) What are the raw materials used for making biogas ? (c ) Describe the construction and working of a biogas plant with the help of a labelled diagram. (d) Write any two uses of biogas. (e) Write any two advantages of using biogas.

(a) What is the picture about? (b) What does the picture of the last man indicate to us and what was he called? (c ) How did the change happen from first man to the last man as shown in the figure?

(a) What is a nuclear reactor ? What is the fuel used in a nuclear reactor ? (b) With the help of a labelled diagram, describe the working of a nuclear power plant. (c ) How is the working nuclear reactor of a power plant shut down in an emergency ? (d) Name five places in India where nuclear power plants are located.

In his seminal work on genetics, Gregor Mendel described the physical traits in the pea plant as being controlled by two 'factors'. What term is used to define these factors today?

A car is moving along a straight road at a steady speed. It travels 150 m in 5 seconds : (a) What is its average speed ? (b) How far does it travel in 1 second ? (c ) How far does it travel in 6 seconds ? (d) How long does it take to travel 240 m ?

Explain the following : (a) How does the middle ear help in hearing ? (b) Why does vitamin A deficiency produce night-blindness ? (c ) What is the role of lacrimal gland ? (d) How does the iris adjust the size of the pupil ?