Explain Why the Presence of a Gelatinous Layer Between the Ectoderm

question 49

Essay

Explain why the presence of a gelatinous layer between the ectoderm and endoderm in ctenophores and cnidarians make understanding the branching order of these phyla difficult.

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Definitions:

Cervical Vertebrae

The seven vertebrae in the neck part of the spine, designated C1 through C7, supporting the skull and enabling various head movements.

Pivot

A central point or pin on which something rotates or balances, or, figuratively, a crucial factor or element around which something depends.

Dense Bones

Bones with higher mineral content and density, making them stronger and less susceptible to fractures compared to less dense bones.

Healthy

A state of complete physical, mental, and social well-being, not merely the absence of disease or infirmity.