Question

The multi-cellular body plan (demonstrated by the Cnideria) are possible because of the evolution of specialized cells resulting from changes that include: a) membrane proteins ( transport proteins, adhering proteins, receptor proteins etc.), b) DNA mutations and chromosomes , c)02 binding molecules such as hemoglobin, receptor peoteins,, enzynes, d) larges polymers, such as Myosin, Insulin starch Glycogen and chitin, e) all of these are correct,

Answer 1

Ans . (e) all of these are correct.

All Cnidarians have radial symmetry. They are diploblastic , which means they have two embryonic tissue layers, the ectoderm and endoderm , which give rise to ectodermis and gastrodermis of adult.

Cnidarians have two distinct body plans , the medusa and polyp.

A multicellular body plan is a group of structural and developmental characteristics that can be used to identify a group of animals, such as a phylum.

The animals can be classified by 3 types of body plan symmetry : radial symmetry, bilateral symmetry, and asymmetry.