What is an organ system? (a) Give two examples of organ systems in animals. (b) Name the two main organ systems in plants.
What contribute more to the difference in organ system design of plants and animals ?
(a) Give an example of an endothermic animal.
(b) Give an example of an ectothermic animal.
(c) Give an example for an organism of the benthic zone.
What are micro-organisms ? Give any two examples of micro-organisms .