The main reason why antibiotics could not solve all the problems of bacteria-mediated diseases is:

Identify $X$ and $Y$ from the following structure of an antibody molecule.

What is responsible for the resistance of insects to insecticides?

Read the following statements carefully and determine how many of them are correct.
$(1)$ Acquired immunity is characterized by memory.
$(2)$ The response provided by antibodies is $C.M.I.$
$(3)$ An exaggerated response of the immune system to certain antigens present in the environment is called allergy.
$(4)$ Innate immunity is antibody-dependent.
$(5)$ Dengue is a bacterial disease.

Match the incorrect pair.

Identify the odd one out.