Why sharing of injection needles between two individuals is not recommended?

In the following question a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as : Assertion (A): Sharing of injection needles between two individuals is not recommended. Reason (R): This transmits STDs like AIDS and Hepatitis from the diseased person to the healthy person.

The offspring from a cross between two individuals differing in at least one set of characters is called

The unequal sharing of bonded pair of electrons between two atoms in a molecule causes ___________.

An association between two individuals or populations where both are benefitted and where neither can survive without the other is

Fill in the blanks : Intersactions between individuals of same species are termed ………….. interactions and those between individuals of different species are termed …………. interactions .

An interaction between two individuals where one is benefitted while the other is neither benefitted nor harmed is called as