Question

An animals phylum is defined on the basis of

• A. Number of germ layers
• B. the uniqueness of its body plan
• C. type of body symmetry
• D. All the above

Answer 1

The correct option is D All the above

An animal phylum is defined on the basis of 6 parameters of which three are - number of germ layers - diploblastic or triploblastic. Type of body plan i.e blind sac pattern, tube within tube pattern and body symmetry - asymmetry, radial symmetry and bilateral symmetry

So, the correct answer is 'All the above'