Sponges

write one difference between porifera and coelenterata

write one difference between porifera and coelenterata

Sponges are sessile metazoans, which lack body symmetry. ... The key difference between Porifera and Coelenterata is that Porifera consist of numerous pores throughout the body, working as water intake and outlet openings whereas Coelenterata consist of a single opening on the body working as mouth/anus.

  1. What is the difference between porifera and cnidaria?
  2. What is the difference between sponges and cnidarians?
  3. What is the difference between protozoa and porifera?
  4. What is the difference between porifera and platyhelminthes?
  5. What do porifera and Cnidaria have in common?
  6. How do Cnidaria eat?
  7. Can sponges move?
  8. Which best describes the feeding habits of cnidaria?
  9. How is being hermaphroditic an advantage to sponges?
  10. What protozoa means?
  11. Why are sponges not considered protozoans?
  12. What are protozoans in biology?

What is the difference between porifera and cnidaria?

Porifera are aquatic organisms known as sponges, while cnidarians are for example jellyfishes, corrals, etc. Poriferans are the most simple multicellular animal organisms. They are always sessile while cnidarians may be sessile (the corrals) or free living (jellyfishes).

What is the difference between sponges and cnidarians?

Sponges have specialized cells and an endoskeleton, but they lack tissues and body symmetry. Many live on coral reefs and have symbiotic relationships with other reef species. Cnidarians are aquatic invertebrates in Phylum Cnidaria. ... All cnidarians have nematocysts, and many are bioluminescent.

What is the difference between protozoa and porifera?

Protozoa are single-celled animal-like organisms such as paramecium, amoebas, etc. Porifera is simply the phylum for sponges. Porifera means "pore bearer" because sponges have holes or pores in which they filter food from the water.

What is the difference between porifera and platyhelminthes?

2)they are mostly endoparasities . 3)the body is dorso-ventrally flattened and is without true segment . 4)this phylum shows the first appearance of organs . 5)they are triploblastic .

What do porifera and Cnidaria have in common?

Porifera and Cnidaria are organisms which share similar characteristics with one another. -They are both multicellular, they consist of many cells working together. They are both eukaryotic, they have DNA in the form of chromosomes contained within a distinct nucleus.

How do Cnidaria eat?

All cnidarians are carnivores. Most use their cnidae and associated toxin to capture food, although none is known actually to pursue prey. ... Once a food item has been captured, tentacles move it to the mouth, either by bending in that direction or by passing it to tentacles nearer the mouth.

Can sponges move?

Movement. Although adult sponges are fundamentally sessile animals, some marine and freshwater species can move across the sea bed at speeds of 1–4 mm (0.039–0.157 in) per day, as a result of amoeba-like movements of pinacocytes and other cells.

Which best describes the feeding habits of cnidaria?

Most cnidarians are carnivorous and their diet consists mainly of small crustaceans. They capture prey in a rather passive manner—as it drifts through their tentacles the cnidarian discharge stinging nematocysts that paralyze the prey.

How is being hermaphroditic an advantage to sponges?

How is being hermaphroditic an advantage to sponges? They produce both male and female gametes and are both sexual and asexual. Describe asexual reproduction in sponges by budding. ... When sponges produce both male and female gametes are formed when amebocytes divide by mitosis.

What protozoa means?

Protozoa (also protozoan, plural protozoans) is an informal term for a group of single-celled eukaryotes, either free-living or parasitic, which feed on organic matter such as other microorganisms or organic tissues and debris. ... In some systems of biological classification, Protozoa remains a high-level taxonomic group.

Why are sponges not considered protozoans?

Unlike Protozoans, the Poriferans are multicellular. However, unlike higher metazoans, the cells that make up a sponge are not organized into tissues. Therefore, sponges lack true tissues and organs; in addition, they have no body symmetry. Sponges do, however, have specialized cells that perform specific functions.

What are protozoans in biology?

Protozoa are single celled organisms. They come in many different shapes and sizes ranging from an Amoeba which can change its shape to Paramecium with its fixed shape and complex structure. They live in a wide variety of moist habitats including fresh water, marine environments and the soil.

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