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Are all deuterostomes coelomates?
Coelomates are either deutermostomes or protostomes. A protostomes have spiral cleavage lie mollusks, annelids, and arthropods. A deutermostomes has radial cleavage such as echinoderms, and chordates.
What are echinoderms considered to be closely related to chordates?
both have deuterostome development...(:
Why are Echinoderms considered to be closely relate to chordates?
both have a nerve cord
Do chordates and echinoderms have a common ancestor?
yes
Are mammalia deuterostomes?
Deuterostomes. All chordates such as birds and mammals are deuterosomes.
how do lower chordates survive on their adaptive features?
echinoderms, cnidaria and other forms
How are echinoderms and chordates similar?
both have a nerve cord
Does echinoderms have a close evolutionary relationship with chordates?
Yes they do. Echinoderms, which include starfish, and chordates, which include humans are closely related in an evolutionary sense due to the way their embryos are formed in the early stages of development. Once past that point, the very obvious differences form.
Among coelomates in which of these does development occur by radial cleavage and the anus forms before the mouth?
Animals with deuterostome development exhibit radial cleavage, where the cells divide parallel or perpendicular to the polar axis of the embryo. In deuterostomes, such as echinoderms and chordates, the anus forms before the mouth during embryonic development.
Where does the first opening which developes in the deuterostomes develope into?
In deuterostomes, the first opening that develops during embryonic development is called the blastopore. This opening typically develops into the anus, while the mouth forms later from a secondary opening. This is in contrast to protostomes, where the blastopore usually becomes the mouth. Examples of deuterostomes include chordates and echinoderms.
Why are Echinoderms classified into phylum Chordata?
Echinoderms are not classified in phylum Chordata. They belong to their own phylum called Echinodermata. Chordates, on the other hand, are characterized by the presence of a notochord, which echinoderms lack.
How is eucoelomata further divided?
Eucoelomata is further divided into two subgroups: Protostomia and Deuterostomia. Protostomes include groups like arthropods, annelids, and mollusks, where the blastopore becomes the mouth. Deuterostomes include chordates, echinoderms, and hemichordates, where the blastopore becomes the anus.
