Question

What are diploblastic animals? Explain.

Answer 1

• Diploblastic animals are those that develop two germ layers during early embryonic development. These layers are the outer ectoderm and the inner endoderm, along with a gelatinous substance called mesoglea in between. (0.5 Mark)
• The endoderm differentiates into true tissue. This includes tissue associated with the gut and associated glands. (0.5 Mark)
• The ectoderm, on the other hand, gives rise to the epidermis and the nervous tissue. (0.5 Mark)
• The mesoglea does not differentiate into any major tissue; it merely serves as an internal skeleton, supporting the body, along with performing other minor functions. (0.5 Mark)