Which of the following substances is produced and released into the environment by an insect to influence the behavior of other members of the same species?

What precautions are required in case of airborne diseases such as pneumonia and the common cold?

Which of the following is associated with the discovery of the well-known fungicide Bordeaux mixture?

What is the full form of $WHO$?

Sting apparatus in honey bee is a modified form of

Which of the following statements are correct?
$(1)$ Yoga is practiced to achieve physical and mental health.
$(2)$ Infectious diseases are very common; all of us have suffered from one or the other at some time.
$(3)$ $AIDS$ is an infectious disease.
$(4)$ Cancer is a non-infectious disease.
$(5)$ $A$ healthy person contributes to economic prosperity.