Answer the following after reading the experiment conducted by William Harvey in textbook page no. 54 & 55.
In which blood vessels valves are found ? What do you think is the function of the valves in them?

Observe the diagram and answer the following questions. valves are present in which blood vessels.

Read the given information and answer the following questions. A survey was conducted in two villages, Vanaparthy and Vaddicherla of Warangal district in Telangana State. The first with no scarcity and the second with scarce groundwater. Well census was carried out in the villages in order to get a complete picture of well irrigation and its status as well as availability of water. There are no alternative sources of supply as against wells in Vaddicherla, where there is an existing tank that has been converted into a percolation tank, so that the water situation is much better in Vanaparthy. In which village, do you suggest drip irrigation ?

You have conducted this experiment in your class room. Now answer the following questions. What do you prove by conducting this experiment ?

You have conducted this experiment in your class room. Now answer the following questions. How do you confirm that glucose solution is free from oxygen after heating it ?

Do oil paper experiments at three different locations and answer the following questions What do you found on those papers dipped in oil?

Read the following information and answer the given questions. To understand the functional relationship between these phases of cell cycle Dr.N.Rao and his research associate Dr.Johnson conducted experiments on cell fusion technique.His researches revealed that the cell cycle is sequential ,unidirectional had controlled by a series of chemical signals.His experiments are considered to be a milestone in the cell cycle studies.This study threw a new hope of ray for the budding scientists to carry out reseraches on cell division. G_+1:3.5 hrs,M:1 hr are the stages in a cell cycle which occur in a manner with specific time. G_1,S,G_2 stages are collectively called……………?

Think of this puzzle What do you need to find a chosen number from this square? Four of the clues below are true but do nothing to help in finding the number. Four of the clues are necessary for finding it. Here are eight clues to use: a. The number is greater than 9. b. The number is not a multiple of 10. c. The number is a multiple of 7. d. The number is odd. e. The number is not a multiple of 11. f. The number is less than 200. g. Its ones digit is larger than its tens digit. h. Its tens digit is odd. What is the number? Can you sort out the four clues that help and the four clues that do not help in finding it? First follow the clues and strike off the number which comes out from it. Like - from the first clue we come to know that the number is not from 1 to 9. (strike off numbers from 1 to 9). After completing the puzzle, see which clue is important and which is not?