Expand the following and mention one application of the following

(i) PCR (ii) ELISA

Draw a diagram of the microscopic structure of human sperm. Label the following parts in it and write their functions.

(a) Acrosome

(b) Nucleus

(c) Middle piece

Name any two sources of e-Wastes and write two different ways for their disposal.

Name two commonly used bioreactors. State the importance of using a bioreactor.

Explain why very small animals are rarely found in polar region.

A student on a school trip started sneezing and wheezing soon after reaching the hill station for no explained reasons. But, on return to the plains, the symptoms disappeared. What is such a response called? How does the body produce it?

In a cross between two tall pea plants some of the off-springs produced were dwarf. Show with the help of Punnett square how this is possible.

Write the function of adenosine deaminase enzyme. State the cause of ADA deficiency in humans. Mention a possible permanent cure for ADA deficiency patient.

Why the pyramid of energy is always upright? Explain.

(a) Mention the difference in the mode of action of exonuclease and endonuclease.