How can you prepare reagents for testing proteins ? What are the reagents and write their concentrations. (OR) Srikanth performed a test and found that proteins are present in the sambar provided in the Midday meals in his school. What are the material required for the test ? How can be prepare them ?

How can you prepare turmeric indicator ? What is the use of it ?

What do you understand by biodiversity ? How can you say variations are present in them?

How can you perform litmus paper test to identify the medium of saliva is alkaline?

How can you prepare Hydrogen in the laboratory by a simple experiment ? With which test do you confirm the presence of Hydrogen ?

How do you prepare carbondioxide ? What substances do you need for its preparation? How is it tested ?

What are the materials required to prepare and test the hydrogen gas in the lab by using acid and metal ? Where do you observe the evolved hydrogen gas ?

You have done experiments for testing various food components in rice, potato, milk, curd, egg with required chemicals reagents. You know well about indications as you did in the class room with your friends. Make a table and write the results as given below. 1) What nutrients are present in milk ?

Let us do the following activity to understand the mendelian principles of heredity. Materaials required: a. 3cm length and 1 cm breadth chart pieces -4 b. 2 cm length and 1 cm breadth chart pieces -4 c. Red byuttons -4 d. white buttons -4 e. chart, scale, sketch pen penil, 2 bags. Method: Prepare a chart with 2x2 boxes along with numbe and symbol as shown in the figure. Game 1: Monohybrid cross (starting with hybrid parents) To start with take 1,2 or 3,4 . In case you start 1,2 pik all the 16 log and short pieces and prepare such paris in each of which you have a long and short piece. Take 4 pairs each of long and short strips and put them in two separate bags. Now each bag contains 8 strips (4 long and 4short). One bag say 'A' represents mael and the bag 'B' represents female . Now rendomly pick one strip each from bag A and B and put them together in the 1 on the chart. Keep picking out the strips and arrange them in the same manner till your bags are empty. Same time your boxes in the chart are filled with paris of strips. you might have got the following combinations, two long strips, one long and one short strip, two short strips. (Q) E. What can you coclude from this game?

In table-3 write the names of the organisms in the appropriate box according to where i they can be found. You could put the name of one organism in more than one column. If you put the organism in the colon in 'some other place', try to mention the place where you could find it.Some examples are filled in to help you. Copy the table 3 in your notebook. Try to enhance the list as much as you can. How many organisms are present in more than one column? Why did you place them here?