Question 3
Animal KingdomThe hydra has two body layers of cells called
- A.ectodermis and enteron
- B.ectoderm and endoderm
- C.endodermis and dermis
- D.epidermis and dermis
Show the answer and explanation
Answer: B (ectoderm and endoderm)
Explanation
Hydra's body wall has an outer ectoderm and an inner endoderm, with jelly (mesogloea) between them.