What is closer to the head on a porifera?

1. Does porifera have a head?
2. Do sponges have a head?
3. Are porifera Monoecious or dioecious?
4. How does porifera move?
5. What kind of sponge is SpongeBob?
6. How do porifera feed?
7. What is the reproduction of porifera?
8. Which is special feature of Porifera?
9. Is Porifera symmetrical?
10. How does the name Porifera relate to the structure of a sponge 2 marks?
11. How do sponges attach themselves to a surface?

Does porifera have a head?

Porifera possess no head and no tail; they are basal metazoans characterized by the absence of true tissues (with few exceptions), a muscular or nervous system sensu stricto, a digestive cavity, and gonads.

Do sponges have a head?

Because sponges are sessile, meaning they cannot move, they filter water to obtain their food. ... You might think that sponges don't look like animals at all. They don't have a head or legs. Internally, they do not have brains, stomachs, or other organs.

Are porifera Monoecious or dioecious?

Sponges are monoecious (hermaphroditic), which means that one individual can produce both gametes (eggs and sperm) simultaneously.

How does porifera move?

Locomotion. Sponges are generally sessile as adults and spend their lives attached to a fixed substratum. They do not show movement over large distances like other free-swimming marine invertebrates. However, sponge cells are capable of creeping along substrata via organizational plasticity.

What kind of sponge is SpongeBob?

SpongeBob is a good-natured, naive, and enthusiastic sea sponge. In The SpongeBob Musical, his exact species of animal is identified: Aplysina fistularis, a yellow tube sponge that is common in open waters. He resides in the undersea city of Bikini Bottom with other anthropomorphic aquatic creatures.

How do porifera feed?

Sponges have a unique feeding system among animals. Instead of a mouths they have tiny pores (ostia) in their outer walls through which water is drawn. Cells in the sponge walls filter food from the water as the water is pumped through the body and the osculum ("little mouth").

What is the reproduction of porifera?

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.

Which is special feature of Porifera?

Characteristic Features of Phylum Porifera

They are generally marine aquatic organisms, with a few freshwater species. Their bodies are asymmetrical. Body shape can be cylindrical, vase-like, rounded or sac-like. They are diploblastic animals with two layers, the outer dermal layer and the inner gastral layer.

Is Porifera symmetrical?

Phylum Porifera (sponges): Aquatic animals with radial symmetry or irregular shapes.

How does the name Porifera relate to the structure of a sponge 2 marks?

The name porifera means 'pore bearer' in Latin (a pore is a tiny hole). A sponge's body is covered by a skin, one cell thick. This skin has lots of small pores and a few large openings. ... These collar cells pump water through the entire sponge and filter out food for the sponge cells to eat.

How do sponges attach themselves to a surface?

Most live in quiet, clear waters, because sediment stirred up by waves or currents would block their pores, making it difficult for them to feed and breathe. Most sponges are anchored to hard surfaces like rocks, but some sponges can attach themselves to soft sediments using a root-like base.