Question

Aristotle classified animals in two groups on the basis of presence or absence of rbc. the group which does not have rbcs is

Answer 1

Hi,
Here is the answer to your query:-
ANAIMA is the group which does not have RBCs.

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Answer 2

Invertebrates is the the group which does not have rbcs as classified by Aristotle.

EXPLANATION:

Aristotle developed the 'first classification system' in which he divided all the known organisms into two main groups. They are Plants and Animals. Then he divided them into smaller groups. He classified them on the ''basis of traits".

Animals were classified based on the presence or absence of 'red blood cells' (RBC). But this classification fails to classify all types of organisms.