(a) What is the basic difference between asexual reproduction and sexual reproduction?
(b) Which of the following organisms reproduce by sexual method and which by asexual method?
Amoeba, Cats, Humans, Hydra, Birds

(a) The basic difference between asexual and sexual method of reproduction are:

Asexual Reproduction	Sexual Reproduction
In asexual reproduction, the offspring arises from a single type of parent.	In sexual reproduction, the offspring arises from two different sexes of parents or involves two different types of gametes.
Example: Amoeba, Hydra, Planaria, Spirogyra, etc.	Example: Dog, Tiger, Human being, etc.

 (b) Sexual method: Cats, Humans, Birds

     Asexual method: Amoeba, Hydra