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Questions and Answers
What is a primary feature of sponges in terms of their structural organization?
How do sponges primarily gather food?
Which of the following statements about sponge reproduction is true?
What is the function of choanocytes in sponges?
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What type of fertilization occurs in sponges?
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Study Notes
Porifera - Sponges
- Porifera are commonly known as sponges.
- Vast majority are marine organisms.
- They lack symmetry.
- They are considered primitive multicellular animals.
- Their organization is at the cellular level.
- Porifera have a water transport or canal system for:
- Food gathering
- Gas exchange
- Waste removal
- Water enters through small pores called ostia and exits through the osculum.
- Choanocytes, or collar cells, line the spongocoel and canals.
- Digestion is intracellular.
- Sponges have a skeleton made up of spicules or spongin fibers.
- They reproduce asexually through fragmentation.
- They reproduce sexually through gamete formation.
- Fertilisation is internal.
- Development is indirect with a larval stage that is morphologically distinct from the adult.
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Description
This quiz examines the fascinating group of marine organisms known as Porifera, or sponges. Explore their unique characteristics, reproductive methods, and their simple structure at the cellular level. Test your knowledge about their anatomy, water canal system, and life cycle.
