Where do you think is more basic characteristic for classifying organism? (a) the place where they live (b) the kind of cells they are made of, why?

The more basic characteristic for classifying organisms is – (b) the kind of cells they are made of. It is erroneous to classify organisms on the basis of the place where they livs (such as aquatic, terrestrial, aerial, etc.) because many different kinds of organisms may live in the same habitat but they do not belong to the same group. For example/ sponges, corals, whales, octopuses, starfishes, fishes (sharks), etc., live in sea but they differ with each other.