Question : An undifferentiated layer, ______, is present in between the ectoderm and the endoderm.
Option 1: coelia
Option 2: acoelomate
Option 3: ectinoglea
Option 4: mesoglea
Correct Answer: mesoglea
Solution : The correct option is mesoglea.
Mesoglea is a gelatinous substance found in the bodies of many cnidarians. It fills the space between the epidermis (outer layer) and the gastrodermis (inner layer) in the body wall of these animals. This layer provides structural support and buoyancy for the organisms.
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