What ways are cnidarians similar to the poriferans?

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.

1. Why are cnidarians and poriferans considered simple animals?
2. What do Cnidaria and platyhelminthes have in common?
3. How are sponges and cnidarians alike?
4. Why are poriferans considered to be animals?
5. How is Mesoglea in cnidarians different from Mesohyl in poriferans?
6. How do Poriferans cnidarians and platyhelminthes differ from other animal phyla?
7. What is the main difference between the Cnidaria and the platyhelminthes phyla?
8. In what ways are cnidarians more complex than the sponges?
9. Do sponges have tissues?
10. What are poriferans and give some of its characteristics?
11. What do sponges and cnidarians not have in common?
12. How are animals of Porifera differ from those of cnidaria?
13. What do choanoflagellates and animals have in common?
14. Is SpongeBob an animal?

Why are cnidarians and poriferans considered simple animals?

The sponges and the cnidarians represent the simplest of animals. Sponges appear to represent an early stage of multicellularity in the animal clade. Although they have specialized cells for particular functions, they lack true tissues in which specialized cells are organized into functional groups.

What do Cnidaria and platyhelminthes have in common?

Like the cnidarians, flatworms have a digestive system with only a single opening into the digestive cavity, but in independently living marine flatworms the cavity branches into all parts of the body (Fig. 3.37 B).

How are sponges and cnidarians alike?

Sponges vs Cnidarians

Sponges and Cnidarians are very primitive acoelomic invertebrates with very simple body structures. Both organisms are found in aquatic ecosystems. Sponges and Cnidarians have no organ systems.

Why are poriferans considered to be animals?

Water is pumped inward through small pore cells into the inner chambers lined by flagellate cells called collar cells. They ingest the food particles and water is expelled through the sponges surface through the osculum. Thus they can be considered animal-like.

How is Mesoglea in cnidarians different from Mesohyl in poriferans?

The main difference between mesoglea in cnidarians and mesohyl in poriferans is that mesoglea in cnidarians mainly composes of water and several substances including fibrous proteins, like collagen and heparan sulfate proteoglycans, whereas mesohyl in poriferans is a gelatinous matrix, mainly composing of collagen, ...

How do Poriferans cnidarians and platyhelminthes differ from other animal phyla?

As a group, how do poriferans, cnidarians, and platyhelminthes differ from other animal phyla? They do not have a body cavity. Why are annelids, arthropods, and molluscs placed in the same clade? They are coelomates.

What is the main difference between the Cnidaria and the platyhelminthes phyla?

Cnidarians are diploblastic, whereas Platyhelminthes are triploblastic. Platyhelminthes possess bilaterally symmetrical, soft, worm-like elongated bodies, whereas cnidarian possess radially symmetrical, soft, medusa-like or polyp-like body forms. Cephalization is present in Platyhelminthes, but not in cnidarians.

In what ways are cnidarians more complex than the sponges?

Cnidarians (ni DER ee uhnz) belong to the phylum cnidaria. All of these have stinging cells. They are more complex than sponges because they have complex tissue, a gut, and a nervous system. They reproduce the same way as a sponge.

Do sponges have tissues?

Sponges are considered the oldest animal phyla. They are multicellular but do not have tissues or organs. ... The small pores are the entrances to a complex system of channels through which the sponge pumps a current of water from which its cells extract tiny particles of food.

What are poriferans and give some of its characteristics?

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.

What do sponges and cnidarians not have in common?

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.

How are animals of Porifera differ from those of cnidaria?

Animals of the phylum Porifera have an asymmetrical body with the cellular level of body organisation, whereas cnidarians have radial symmetry and tissue level of body organisation. Cnidarians have nematocysts, whereas poriferans have choanocytes performing different functions.

What do choanoflagellates and animals have in common?

There are striking physical resemblances between choanoflagellates and certain animal cells, specifically the feeding cells of sponges, called choanocytes. ... These similarities indicate that the unicellular ancestor of animals probably had a flagellum and a collar, and may have been much like a choanoflagellate.

Is SpongeBob an animal?

Role in SpongeBob SquarePants

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.