CameraIcon
CameraIcon
SearchIcon
MyQuestionIcon
MyQuestionIcon
Question

Members of which phylum are deuterostomes?

A
Mollusca
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
Echinodermata
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
C
Arthropoda
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
Annelida
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is A Echinodermata
Animals are classified into protostomes and deuterostomes based on whether the mouth develops first or the anus.

In Protostomes, the mouth develops first from the blastopore. Blastopore is the opening of the archenteron, which is formed during the gastrula stage. Anus develops later. As the mouth is formed first, these animals are called protostomes. ‘Proto’ means first and ‘stoma’ means mouth. Protostomes include annelids, arthropods and molluscs.

In deuterostomes, blastopore develops into anus and the mouth is formed later. As the mouth is formed as a secondary opening, these animals are called deuterostomes. ‘Deutero’ means secondary and ‘stoma’ means mouth. Deuterostomes include echinoderms, hemichordates and chordates.


flag
Suggest Corrections
thumbs-up
2
BNAT
mid-banner-image