Sponges are classified into different classes primarily based on the composition of their:
Show answer and explanation
Correct answer: Skeletal spicule composition
The skeletal framework of sponges is composed of spicules (calcareous or siliceous) or spongin fibers. The chemical nature and morphology of these spicules are the primary taxonomic criteria for classifying Porifera into classes.
Practice all 20 Protista, Porifera, Cnidaria: Features questions
Keep practicing
More Protista, Porifera, Cnidaria: Features questions
- Which Protozoan group is characterized by the presence of two nuclei—a macronucleus and a micronucleus?
- The central cavity of a sponge, through which water flows before exiting, is called the:
- Cnidarians are described as 'diploblastic' because their body develops from which two germ layers?
- The 'contractile vacuole' found in many freshwater Protists is primarily used for:
- Which canal system is the most complex and efficient in sponges, characterized by highly folded walls and flagellated chambers?
- Obelia is a classic example of a Cnidarian that exhibits 'Metagenesis.' What does this term refer to?