Sponges reproduce by sexual and asexual methods that include fragmentation or budding; the production of
< /g-bubble>is another asexual method of reproduction, but found only in freshwater sponges.< /p>
How does an adult sponge reproduce asexually? Porifera have three methods of asexual reproduction: fragmentation, budding, or gemmules. Sponges aren’t cephalized organisms, which means they don’t have a distinct head or specialized cells.
Sponges can reproduce both sexually by gametes and asexually by budding. Although sponges are hermaphroditic, individuals only produce one type of gamete at a time. There are two forms of asexual reproduction that sponges can undergo: external budding and internal budding.
Sponges that reproduce asexually produce buds, or more commonly gemmules, which are packets of multiple cells of different types in a protective shell. Freshwater Spongillidae sponges often produce gemmules before winter. These then develop into adult sponges from the following spring.
Sponges have three asexual methods of reproduction: after fragmentation; through buds; and by crafting Gemmules.
The typical means of asexual reproduction is either fragmentation (wherein a piece of the sponge breaks off, settles on a new substrate and develops into a new individual) or budding (a genetically identical outgrowth from the parent eventually detaches or remains attached to form a colony).
Fragmentation as a method of reproduction is observed in organisms such as filamentous cyanobacteria, molds, lichens, sponges, acoel flatworms, some annelids and starfish.
Asexual reproduction also occurs in sponges in a variety of ways; The most well-known method is called gemmulation.
All sponges are sexually reproduced only. All sponges are aquatic organisms. All sponges are radially symmetrical.
Many sponges are hermaphrodites, others never change sex in their lifetime. Still others alternate between male and female one or more times. Most studies on sponge reproduction have been performed on shallow-water sponges, with only conclusions drawn for deep-sea sponges.
Key Points. Although sponges do not have organized tissues, they rely on specialized cells such as choanocytes, porocytes, amebocytes, and pinacocytes for specialized functions in their bodies. The mesohyl acts as a kind of endoskeleton and helps maintain the tubular shape of sponges.
Answer and Explanation: The statement that is true about sponges is c) They lack real tissue. Sponges are very primitive organisms made up of cells, but their cells…
Physiological processes in sponges
Gas exchange, circulation and excretion take place through diffusion between cells and the water.
Reproduction by fragmentation is observed in sponges, some cnidarians, turbellarians, echinoderms and annelids. In some starfish, a new individual can be regenerated from a broken arm and a piece of the central disk.