試題詳解

複選題
32. Which of the following features belong to the coral? 1. a gastrovascular cavity 2. a polyp stage 3. a medusa stage 4. cnidocytes 5. a pseudocoelom
(A) 1 and 4
(B) 2 and 3
(C) 2, 3, and 4
(D) 1, 2, 3, and 4
(E) all five of these