What is the form of Spongilla?
Spongilla lacustris have the ability to reproduce both sexually and asexually. They become dormant during winter. The growth form ranges from encrusting, to digitate, to branched, depending upon the quality of the habitat….
| Spongilla lacustris | |
|---|---|
| Class: | Demospongiae |
| Order: | Spongillida |
| Family: | Spongillidae |
| Genus: | Spongilla |
What is the function of Spongilla?
For reproduction, every spongilla produces both sperm and egg in its body so are known as hermaphroditic organisms. Only eggs get released in the water and reach the body cavity of the spongilla through the gateway of ostia. Inside the body, cavity larvae develop after the fertilisation or fusion of egg and sperm.
What are the characteristics of Spongilla?
Spongilla is a genus of freshwater sponges. They are found attached to rocks, sticks and plants. To withstand adverse weather conditions, they have a dormant stage known as gemmules. These sponges have a thin dermal layer and have a soft texture.
Where is Spongilla found?
Spongilla is a genus of freshwater sponges with over 200 different species. Spongilla was first publicly recognized in 1696 by Leonard Plukenet and can be found in lakes, ponds and slow streams. Spongilla have a leuconoid body form with a skeleton composed of siliceous spicules.
How do you identify a Spongilla?
1)It is a freshwater colonial sponge found usually. They are attached to sticks of wood in lakes and ponds. They are yellowish brown in colour and consist of numerous small individuals with flat base. Spongilla have canal system is of rhagon type and skeleton is of spongin fibres .
What is the phylum of Spongilla?
SpongeSpongilla / Phylum
Are Spongilla bilaterally symmetrical?
Only Spongilla is asymmetrical( the body is not differentiated into equal planes) while all the others are bilaterally symmetrical( the opposite sides are similar).
How do you pronounce Hydra Greek island?
Hydra (Greek: ‘Υδρα Ydra or Idhra, pronounced “EE-thra”) is one of the Saronic Gulf Islands in central Greece.
What is the symmetry of Spongilla?
asymmetrical
Spongilla is asymmetrical and not radially symmetrical.
Do Spongilla have collar cells?
So, the correct answer is ‘Spongilla has special collared cells called choanocytes while it is not found in the other three’.
Why is Hydra famous?
Hydra, also called the Lernean Hydra, in Greek legend, the offspring of Typhon and Echidna (according to the early Greek poet Hesiod’s Theogony), a gigantic water-snake-like monster with nine heads (the number varies), one of which was immortal.
What is not allowed on Hydra Greece?
Rubbish trucks are the only motor vehicles on the island, since by law, cars and motorcycles are not allowed. Horses, mules and donkeys, and water taxis provide public transportation. The inhabited area, however, is so compact that most people walk everywhere.
Is Spongilla bilateral?
Complete answer: Spongilla is asymmetrical and not radially symmetrical.
Do Spongilla have choanocytes?
Who killed Hydra?
Heracles (Hercules)
Heracles (Hercules) battling the Lernaean Hydra; at the southern entrance to the Hofburg (Imperial Palace) in Vienna. The destruction of the Lernean Hydra became one of the 12 Labours of Heracles. For that and other labours, Heracles enlisted the aid of his nephew Iolaus.