9 Questions
What are the main differences between Series Proterostomia and Series Deuterostomia in terms of cleavage, mouth development, coelom formation, mesoderm derivation, and included animal phyla?
The main differences between Series Proterostomia and Series Deuterostomia are: 1) Cleavage in Proterostomia is spiral and determinate, while in Deuterostomia it is radial and indeterminate. 2) The mouth in Proterostomia arises from the blastopore or its anterior margin, whereas in Deuterostomia the mouth is formed at some distance anterior to the blastopore and the blastopore forms the anus. 3) Coelom formation in Proterostomia is due to splitting of mesoderm (schizocoelous), while in Deuterostomia it is developed as an outpouching of archenteron (enterocoelous). 4) Mesoderm in Proterostomia is derived from cells on the anterior lip of blastopore, while in Deuterostomia it is derived from the wall of the developing gut (archenteron). 5) Series Proterostomia includes animals belonging to phyla Aschelminthes (Nematoda), Annelida, Mollusca, and Arthropoda, whereas Series Deuterostomia includes animals belonging to phyla Echinodermata, Hemichordata, and Chordata.
What is the significant developmental difference between Series Proterostomia and Series Deuterostomia regarding the formation of the mouth and anus?
The significant developmental difference is that in Series Proterostomia, the mouth arises from the blastopore or its anterior margin, while in Series Deuterostomia, the mouth is formed at some distance anterior to the blastopore, and the blastopore forms the anus.
How does the origin of the coelom differ between Series Proterostomia and Series Deuterostomia?
The origin of the coelom differs between Series Proterostomia and Series Deuterostomia in that in Proterostomia, the coelom is formed due to the splitting of mesoderm (schizocoelous), while in Deuterostomia, the coelom is developed as an outpouching of the archenteron (enterocoelous).
What is the difference between cleavage in Series Proterostomia and Series Deuterostomia?
In Series Proterostomia, cleavage is spiral and determinate, while in Series Deuterostomia, cleavage is radial and indeterminate.
How does the formation of the mouth differ between Series Proterostomia and Series Deuterostomia?
In Series Proterostomia, the mouth arises from the blastopore or its anterior margin, whereas in Series Deuterostomia, the mouth is formed at some distance anterior to the blastopore.
What is the difference in mesoderm derivation between Series Proterostomia and Series Deuterostomia?
In Series Proterostomia, mesoderm is derived from cells on the anterior lip of the blastopore, while in Series Deuterostomia, mesoderm is derived from the wall of the developing gut (archenteron).
Explain the differences between cleavage in the Proterostomia and Deuterostomia series.
In the Proterostomia series, cleavage of the zygote is spiral and determinate, while in the Deuterostomia series, cleavage is radial and indeterminate.
How does the formation of the mouth differ between the Proterostomia and Deuterostomia series?
In the Proterostomia series, the mouth arises from the blastopore or from its anterior margin, whereas in the Deuterostomia series, the mouth is formed at some distance anterior to the blastopore and the blastopore forms the anus.
Explain the origin of the coelom in the Proterostomia and Deuterostomia series.
In the Proterostomia series, the coelom is formed due to the splitting of mesoderm (schizocoelous), while in the Deuterostomia series, the coelom is developed as an outpouching of archenteron (enterocoelous).
Test your knowledge of animal development with this quiz comparing Protostomes and Deuterostomes. Identify key differences in cleavage, mouth development, coelom formation, and mesoderm origin.
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