In sycon the larva is?
Last Update: April 20, 2022
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Option D: Amphiblastula is the larval stage of Sycon.
What is the larva of a sponge called?
After reproduction, sponge produces larva called as stomoblastula. It has a mouth and feeds on nurse cells within mesogloea and grows for a few days. Stomoblastula develops into an amphiblastula by inverting inside out and brings the flagellated cells on the outer surface, so that the larva can swim in water.
What is the larva of Leucosolenia?
Parenchymula is larva of sponges and as Leucosolenia is a type of sponges so its larva is also called parenchymula.
What is larvae in porifera?
Amphiblastula larva is a typical free swimming larva formed in Sycon sponge reproduction. It is ova! in shape. It shows small micromeres with flagella on one side. The other half of the larva shows large macromeres. The larva comes out of the sponge through osculum.
What is the name of larval stage of porifera?
The common larval stages found in sponges are Amphiblastula (found in scypha) and parenchymula (found in leucosolenia).
The larva of Sycon is
How do porifera feed?
In order obtain food, sponges pass water through their bodies in a process known as filter-feeding. Water is drawn into the sponge through tiny holes called incurrent pores. ... As it passes through the channels and chambers inside the sponge, bacteria and tiny particles are taken up from the water as food.
What is Parenchymula larva?
parenchymula A sponge larva in which the area of non-flagellate cells is very small. A Dictionary of Zoology. "parenchymula ."
Do all mollusks have Trochophore larvae?
Introduction to Molluscs
They share a distant common ancestor with the annelid worms, an evolutionary heritage suggested by their larval form, called a trochophore larva, found in all molluscs and in certain marine annelids called polychaete worms.
What type of digestion do porifera have?
In sponges, in spite of what looks like a large digestive cavity, all digestion is intracellular. The limit of this type of digestion is that food particles must be smaller than individual sponge cells.
What is the meaning of Spongocoel?
: the internal cavity of a sponge discharging by way of the osculum.
What is Coeloblastula larva?
Although the coeloblastula is a major type of sponge larva, our knowledge about its development is scanty. ... The larval flagellated cells soon lose their flagellum and begin the process of dedifferentiation. Then the larva becomes a mass of dedifferentiated cells in which many autophagosomes are found.
Is larva like stage of Hydra?
So, the correct answer is 'Planula'
Where are the Choanocytes located?
Location. Choanocytes are found dotting the surface of the spongocoel in asconoid sponges and the radial canals in syconoid sponges, but they comprise entirely the chambers in leuconoid sponges.
What is brachiolaria larva?
A brachiolaria is the second stage of larval development in many starfishes it follows the bipinnaria. Brachiolaria have bilateral symmetry, unlike the adult starfish, which have a pentaradial symmetry. ... The adult starfish develops only from the hind-part of the larva, away from the sucker.
What kind of creature is a sponge?
Sponges constitute the phylum Porifera, and have been defined as sessile metazoans (multicelled immobile animals) that have water intake and outlet openings connected by chambers lined with choanocytes, cells with whip-like flagella.
What is a boring sponge?
Cliona celata, occasionally called the boring sponge, is a species of demosponge belonging the family Clionaidae. It is found worldwide. This sponge creates round holes up to 5 millimetres (0.20 in) in diameter in limestone or the shells of molluscs, especially oysters.
Are sponges asexual?
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. ... Sponges that reproduce asexually produce buds or, more often, gemmules, which are packets of several cells of various types inside a protective covering.
Who eats sponges?
What are some predators of Sponges? Predators of Sponges include fish, turtles, and echinoderms.
Where do sponges digest?
The sponges draw water carrying food particles into the spongocoel using the beating of flagella in the choanocytes. The food particles are caught by the collar of the choanocyte and brought into the cell by phagocytosis. Digestion of the food particle takes place inside the cell.
Is Mollusca a trochophore?
Trochophore, also called trochosphere, small, translucent, free-swimming larva characteristic of marine annelids and most groups of mollusks. ... In some mollusks (such as gastropods and bivalves), the trochophore develops into a second stage, the veliger (q.v.), before metamorphosing to adult form.
Do gastropods have trochophore larva?
The veliger is the characteristic larva of the gastropod, bivalve and scaphopod taxonomic classes. It is produced following either the embryonic or trochophore larval stage of development. ... The velum and foot of the veliger can be retracted into the shell to protect these structures from predators or mechanical damage.
Do mollusks have feet?
Mollusks have a muscular foot, which is used for locomotion and anchorage, and varies in shape and function, depending on the type of mollusk under study. In shelled mollusks, this foot is usually the same size as the opening of the shell. The foot is a retractable as well as an extendable organ.
Which is the larva of Mollusca?
Veliger, larva typical of certain mollusks such as marine snails and bivalves and a few freshwater bivalves. The veliger develops from the trochophore (q.v.) larva and has large, ciliated lobes (velum).
Are our bodies full of pores?
Phylum porifera are multicellular organisms that have bodies full of pores and channels allowing water to circulate through them, consisting of jelly-like mesohyl sandwiched between two thin layers of cells.
How do porifera excrete?
Excretion occurs through both the oscula and the surface of the sponge. Special amoebocytes disintegrate in the mesohyl, and their granules are expelled through the canals. The excretory products of the sponges—ammonia and other nitrogen-containing substances—account for their characteristic unpleasant odour.