Archive | Phylum Chordata

Difference between Protostomes and Deuterostomes | Phylum Chordata

The upcoming discussion will update you about the difference between protostomes and deuterostomes. Difference # Protostomes:    1. Cleavage: Spiral, determinate or mosaic 2. Blastopore: Mouth develops from blastopore 3. Coelom: Schizocoelic (splitting of mesodermal) 4. Mesoderm: From 4d cell, proliferation 5. Arrangement of coelomic cavities: Variable in number 6. Larval type: Trochophore 7. Larval ciliary bands: Compound cilia from 1 [...]

By |2016-07-22T08:09:53+00:00July 22, 2016|Phylum Chordata|Comments Off on Difference between Protostomes and Deuterostomes | Phylum Chordata
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Continental Drift: Theory, Evidences and Explanation

In this article we will discuss about Continental Drift:- 1. Continental Drift Theory 2. Peninsular India 3. Paleontological Evidence of Continental Drift 4. Physical Evidence of Continental Drift 5. Palaeoclimate 6. Explanation of the Continental Drift Theory in the Light of Vertebrate Distribution. Contents: Continental Drift Theory Peninsular India Paleontological Evidence of Continental Drift Physical Evidence of Continental Drift Palaeoclimate [...]

By |2016-07-22T08:09:53+00:00July 22, 2016|Phylum Chordata|Comments Off on Continental Drift: Theory, Evidences and Explanation
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Difference between Protochordates and Higher Chordates

The upcoming discussion will update you about the difference between protochordates and higher chordates. Difference # Protochordates: 1. Notochord persists throughout life. 2. No cranium or vertebral column. 3. Atrium, the space in between pharynx and body wall, is present. 4. Endostyle is present except hemichordates. It is the precursor of thyroid gland of high­er vertebrates. 5. Absence of neural [...]

By |2016-07-22T08:09:53+00:00July 22, 2016|Phylum Chordata|Comments Off on Difference between Protochordates and Higher Chordates
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