State in brief the principle of immunisation.
State in brief the principle of immunisation.
Immunization, or immunisation, is the process by which an individual's immune system becomes fortified against an agent (known as the immunogen). The most important elements of the immune system that are improved by immunization are the T cells, B cells, and the antibodies B cells produce.
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A body of mass 2kg is thrown vertically upwards with an initial velocity of 20m/s. What will be its potential energy at the end of 2s? (Assume g = 10m/s2).
Describe the composition of human blood.
Which will happen if chloroplast is taken out of the cell and illuminated?
Describe structure and functions of Golgi apparatus.