How do Poriferans reproduce?
Sponges reproduce by both asexual and sexual means. Most poriferans that reproduce by sexual means are hermaphroditic and produce eggs and sperm at different times. Sperm are frequently “broadcast” into the water column.
What is the function of Amoebocytes in sponges?
Amoebocytes function in regeneration and in transportation of food particles acquired at the choanocytes throughout the body of the sponge.
What is sycon reproduction?
Reproduction in Sycon: Sycon reproduces both asexually and sexually. During asexual reproduction it produces bud and sometimes produces special bodies resembling the gemmules of freshwater sponges. During sexual reproduction, both sperms and ova are produced from the archaeocytes which are present in the mesoglea.
What is fragmentation in sponges?
The typical means of asexual reproduction is either fragmentation (where 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).
How do sponges asexually reproduce?
Reproduction for sponges can be accomplished both sexually and asexually. There are three ways for a sponge to reproduce asexually: budding, jemmules, and regeneration. Sponges can simply reproduce by budding, where a new sponge grows from older ones and eventually break off.
What is the function of the spongocoel in a sponge?
The spongocoel is lined by a variety of cell types, each having a unique function: porocytes – line the pores of the sponge and are the structure through which water is taken into the organism. choanocytes – exhibit flagella that create inward currents of water for the sponge’s stationary filter feeding mechanism.
What is the function of the osculum in a sponge?
The osculum (plural “oscula”) is an excretory structure in the living sponge, a large opening to the outside through which the current of water exits after passing through the spongocoel. Wastes diffuse into the water and the water is pumped through the osculum carrying away with it the sponge’s wastes.
Does sycon exhibit internal fertilization?
Both Spongilla and sycon shows internal or endogenous budding. It is the type of asexual reproduction where individual daughter buds are developed in a mass of cells and gets released after germination.
What is sycon Class 9?
Sycon is a marine sponge widely distributed in shallow water. Typically, it is found attached to shells, rocks and is sedentary. Predominantly, they harbor in temperate regions.
Do sponges reproduce by fragmentation?
Pieces of sponge are able to regenerate into whole new sponges. Asexual reproduction occurs by budding or by fragmentation. The buds may remain attached to the parent or separate from it, and each bud develops into a new individual.
How do poriferas reproduce?
Poriferas are the most animals at asexual reproduction, which happens without the uniting of the eggs and the sperms or transfer of DNA from two parents. Poriferas can reproduce asexually when a piece of the animal break off and grows into a separate adult. Poriferas can also reproduce through another methods known as budding.
What are the characteristics of Porifera?
Introduction To Porifera. Poriferas are also known as sponges. These species are either male or female, but others produce both eggs and sperms. They either use their asexual or sexual reproduction. This helps sponges live and survive in their habitats.
Why do sponges reproduce asexually?
This helps sponges live and survive in their habitats. Poriferas are the most animals at asexual reproduction, which happens without the uniting of the eggs and the sperms or transfer of DNA from two parents. Poriferas can reproduce asexually when a piece of the animal break off and grows into a separate adult.
What is protandry and protogyny in sponges?
Sponges exhibit protandry, production of sperms first and ova later or protogyny, production of ova first and sperms later. Both protandry and protogyny facilitate cross fertilization. The sperm mother cell or a spermatogonium is the enlarged archaeocytes. This spermatogonium is surrounded by one or more flattened cover cells to form spermatocyst.