The hydra has two body layers of cells called
- ectodermis and enteron
-
ectoderm and endoderm
- endodermis and dermis
- epidermis and dermis
The correct answer is: B
Explanation
The two body layers of a hydra are the endoderm and ectoderm
- Endoderm: The inner layer of Hydra's body wall
- Ectoderm: The outer layer of Hydra's body wall