0
Add your answer:
Earn +20 pts
What kind of animals have collar cells an osculum an spicules?
Sponges have collar cells, osculum, and spicules.
Do cnidarians have spicules?
No, cnidarians do not have spicules. Spicules are small, needle-like structures made of calcium carbonate or silica that are found in some sponges and echinoderms for support and defense. Cnidarians, such as jellyfish and corals, have a different type of support structure called a mesoglea.
Which layer of the sun contains jets of rapidly moving gas called spicules?
The chromosphere is the layer of the sun that contains jets of rapidly moving gas called spicules. Spicules can extend from the chromosphere into the corona of the sun.
What cellular structures are found in the epidermal cells of humans but not in epidermal cell of leaves?
Melanocytes, which produce melanin for skin pigmentation, are found in human epidermal cells but not in leaf epidermal cells. Additionally, human epidermal cells contain structures like Langerhans cells for immune response, which are not present in leaf epidermal cells.
Is not a hydrogenous sediment?
Calcareous ooze
What is a calcisponge?
A calcisponge is any of a group of marine sponges containing calcareous spicules - spicules which resemble calcium carbonate.
What is a calcareous sponge?
A calcareous sponge is any of a variety of sponge of the class Calcarea, with skeletons composed of spicules of calcium carbonate.
What is the main difference between the classes Hexactinellida Calcarea and Demospongiae?
In calcarea spicules are calcareous, in hexactinellida spicules are silicious and hexa radiated, in demospongiae spicules are absent but spongin fibres are present. that's why demosponges are used as bathroom sponges
What sponges have a skeleton?
Sponges don't have skeletons! They are invertebrates which means the creature doesn't have a backbone, but in this case, it doesn't have a skeleton! (I think this is right, I apologize if it isn't)
What is the function of spicules?
Spicules are small needle-like structures found in some animals like sponges and sea urchins. They serve various functions including structural support, defense against predators, and aiding in movement.
What class do Grantia belong to?
Grantia belong to the class Calcarea, a class of marine sponges characterized by their calcareous (calcium carbonate) spicules. They are filter feeders that are commonly found in shallow coastal waters.
What is Porifera made up of?
They are supported by a skeleton made up of the protein collagen and spicules, which may be calcareous or siliceous, depending on the group of sponges examined. Skeletal elements, choanocytes, and other cells are imbedded in a gelatinous matrix called mesohyl or mesoglea
What is sponge?
Any of numerous aquatic, chiefly marine invertebrate animals of the phylum Porifera, characteristically having a porous skeleton composed of fibrous material or siliceous or calcareous spicules and often forming irregularly shaped colonies attached to an underwater surface.
What are the functions of spicules in sponges?
Spicules provide structural support.
What organisms are found in porifera?
Porifera are sea sponges. They have no symmetry (asymmetrical) and they are one of the most basic forms of life. They have a 2 cell layer wall made of collar cells, spicules, amoeba like cells, and a layer of epidermal like cells. The spicules and the amoeba like cells are in between the layer of collar cells and epidermal cells. Sponges also have pores throughout their structure. Porifera include freshwater sponges as well of marine varieties. Freshwater sponges are common although not obvious. Frequently they are green in color due to included algae.
What are the adaptation of calcareous algae?
calcareous alge adaptations
What is a scientific name for Calcareous algae?
calcareous algae
