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Questions and Answers
What is the main method of water transport in sponges?
What is the main method of water transport in sponges?
- Transport through a central canal
- Passive flow through pores and channels (correct)
- Diffusion through the body wall
- Active pumping using specialized cells
How do sponges reproduce asexually?
How do sponges reproduce asexually?
- By releasing spores into the environment
- By fragmentation of the adult body (correct)
- By internal fertilization
- By forming gametes within their body
What is the main mode of digestion in sponges?
What is the main mode of digestion in sponges?
- Intracellular digestion within cells (correct)
- Extracellular digestion in a stomach
- Absorption of pre-digested nutrients
- Digestion by symbiotic bacteria
How are sex cells produced in sponges?
How are sex cells produced in sponges?
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What is the reproductive strategy of sponges known as when they produce both eggs and sperm?
What is the reproductive strategy of sponges known as when they produce both eggs and sperm?
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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.
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