Question

Differentiate between Protostomes type and deuterostomes type.

Answer 1

Hint: If the blastospores turn into the anus during the embryonic development of metazoans, these animals are known as deuterostomes and another side cavity transforms into the mouth. Echinodermata, chordates, hemichordata, etc have belonged under these categories.

Complete answer:

Protostomes	Deuterostomes
When the blastospores transform into the mouth and another cavity turns into the anus are called protostomes.	In deuterostomes, the blastospores transformed into the anus during the embryonic development.
The solid masses of the embryonic mesoderm split to form coelom. Their coelom is known as schizocoelous.	The longitudinal pouches of the archenteron fold to form the coelom. Their coelom is known as enterocoelous.
Formation of archenteron does not occur.	Formation of archenteron occurs during the initial stages of the embryo.
The Nervous system has solid and ventral nerve cords.	The Nervous system has hallowed nerve fibres.
The gastrointestinal tract forms the anus by tunnelling itself into the embryo.	The gastrointestinal tract forms the mouth by tunnelling itself into the embryo.
In the cell ciliation process multiple cells are involved.	In the cell ciliation process, only a single cell is involved.
They have a simple body composition.	They have complex body composition.
By nature, these animals are priapulids.	By nature, they are enterocoelous.
Formation of mouth forms at first	Anal opening forms at first.
Cleavage is determinate and spiral.	Cleavage is indeterminate and radial.
Annelids, flatworms, arthropods, bees etc are simpler and lower organisms are included in protostomes.	Human, monkey, etc complex and higher organisms are included in deuterostomes.

Note: The protostomes consist of primitive invertebrate species whereas the deuterostomes consist of vertebrates, Urochordata, etc. The animals include bilateral symmetry and three germ layers. Altogether with xenacoelomorpha and deuterostomes members form the bilateria. The difference between the protostomes and deuterostomes are depending upon the position of their organs.