Question

Write down the criteria for animal classification ​

Answer 1

Answer:

Criteria for animal classification are:

1. Symmetry: Animals are radially symmetrical, bilaterally symmetrical or asymmetrical.

2. Segmentation: Animals may or may not have segmented body.

3. Appendages: Animals may have organs or parts attached to the trunk or outer body wall.

4. Skeleton: Animals may have exoskeleton or endoskeleton.

5. Embryonic development:

6. Circulatory system: Animal may have open or closed circulatory system.

7. Body cavity: Animals may be coelomate, psuedocoelomate or acoelomate.

8. Habitat: Animals may be terrestrial or aquatic. Aquatic animals may live in either fresh water or sea water.

9. Germ layers: Animals may be diploblastic or triploblastic

Answer 2

Criteria for animal classification are:

• Symmetry: Animals are radially symmetrical, bilaterally symmetrical or asymmetrical.

• Segmentation: Animals may or may not have segmented body.

• Appendages: Animals may have organs or parts attached to the trunk or outer body wall.

• Skeleton: Animals may have exoskeleton or endoskeleton.

• Embryonic development

• Circulatory system: Animal may have open or closed circulatory system.

• Body cavity: Animals may be coelomate, psuedocoelomate or acoelomate.

• Habitat: Animals may be terrestrial or aquatic. Aquatic animals may live in either fresh water or sea water.

• Germ layers: Animals may be diploblastic or triploblastic.