Which of these can be observed in the mesohyl of various undisturbed sponges at one time or another?1. amoebocytes2. spicules3. spongin4. zygotes5. choanocytes
1 only
1 and 2
1, 2, and 3
1, 2, 3, and 4
(D) 1, 2, 3, and 4
Explanation:
