NEETBotanyAnimal Kingdom
Water transport system Phylum A. Minute pores (ostia) to central cavity (spongocoel) to osculum 1. Sponges B. Gastro-vascular cavity with a single opening 2. Ctenophores C. Central cavity with ciliated comb plates 3. Cnidarians D. Absorption through body surface 4. Platyhelminthes
Options
- AA - 2, B - 3, C - 4, D - 1
- BA - 1, B - 3, C - 2, D - 4
- CA - 4, B - 1, C - 2, D - 3
- DA - 3, B - 4, C - 1, D - 2
Correct answer
B. A - 1, B - 3, C - 2, D - 4
Step-by-step solution
Sponges use a water transport system with ostia, spongocoel, and osculum. Cnidarians have a gastro-vascular cavity with a single opening. Ctenophores have central cavities with comb plates. Platyhelminthes absorb nutrients through their body surface.