5 Questions
What is the main method of water transport in sponges?
Passive flow through pores and channels
How do sponges reproduce asexually?
By fragmentation of the adult body
What is the main mode of digestion in sponges?
Intracellular digestion within cells
How are sex cells produced in sponges?
Through mitosis of specialized reproductive cells
What is the reproductive strategy of sponges known as when they produce both eggs and sperm?
Hermaphroditic reproduction
Study Notes
Phylum Porifera
- Phylum Porifera belongs to the kingdom Animalia and is characterized by the presence of pores and channels that allow water to flow through their bodies.
Body Structure
- The body of a sponge is supported by a skeleton made up of apicules or spongin fibers.
- Choanocyte cells, also known as collar cells, line the inner surface of the sponge's body and are involved in food capture and digestion.
Digestion and Nutrition
- Digestion in sponges is intracellular, meaning it occurs within individual cells.
Reproduction
- Sponges are hermaphroditic, meaning they produce both eggs and sperm.
- Reproduction occurs both asexually through fragmentation and sexually through the formation of gametes.
- Fertilization is internal, and development is indirect, involving a larval stage that is morphologically distinct from the adult.
Test your knowledge on Porifera, a phylum in the animal kingdom known for its unique characteristics like lacking true tissues and organs, having a porous body with channels for water transport, and being predominantly marine organisms. Explore concepts related to their feeding, reproduction, and skeletal structure.
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