Question

1. what are the three layers make up the body of a cnidarian?

• endoderm, mesoglea, ectoderm
• ectoderm, mesoderm, mesoglea
• endoderm, mesoglea, epidermis
• endoderm, mesoderm, ectoderm

Explanation:

Cnidarians (like jellyfish, corals) have a diploblastic body plan, meaning they have two true tissue layers (ectoderm and endoderm) with a gel - like mesoglea in between. The three layers that make up their body are endoderm (inner layer), mesoglea (middle gel - like layer), and ectoderm (outer layer). The other options either include mesoderm (which cnidarians don't have as they are diploblastic) or incorrect layers like epidermis (epidermis is part of the ectoderm in some contexts, not a separate layer here).

Answer:

A. endoderm, mesoglea, ectoderm