activity

ABA inhibits mitosis in vascular cambi..

Mark two distinct points A and B on the plane of your note book. Can you draw a line passing through A and B? By experience we find that we can draw only one line through two distinct points A and B. Hence "Given any two distinct points in a plane, there exists one and only line containing them"..

Draw parallel line segments and parallel rays as shown below. The distance between parallel lines is the same at every poi..

Draw parallel line segments and parallel rays as shown below. The distance between parallel lines is the same at every poi..

The fan driven by an electric motor reduces the pressure near the mouthpiece. The pressure due to atmosphere being large, forces air along with dust particles into the long tube and then, into the bag. The fan forces the air out of the sweepe..

Hold your bag with a strap made of a thin but strong string. Now lift the same bag with another strap made of a wide cloth band. You will find that carrying a school bag with a wide cloth band is more comfortable than carrying the same with a thin strip. This is because in the second case the weigh..

The occurrence of starch in the leaves proves that photosynthesis has taken place. Starch can be tested with the help of iodine solutio..

To study the action of pepsin on proteins - Boil egg white in distilled water till a cloudy suspension is obtained. Cool it and divide the mixture into five equal portions in separate test-tubes. Label them A to E. Add different substances to each of the five tubes as shown in the table below and e..

Activation of Adaptive Immunity - Antigens are processed by antigen presenting cells like macrophages. The processed antigen is presented on the surface of these cells. A group of T-cells called T helper cells specifically interacts with the presented antigen and becomes activated..

Alkyl halides readily combine with active metals like sodium, magnesium, cadmium, lithium et..