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Cnidarians are radially symmetrical animals having sacklike bodies with only one opening and tentacles with stinging structures; they occur in polyp and medusa forms whereas Poriferans are primitive multicellular marine animals whose porous bodies are supported by a fibrous skeletal framework; they usually occur in sessile colonies.
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How does method by which cnidarians obtain food differ from method by which poriferans obtain food?
Poriferans needs organic substances and cnidarians needs of a gastrovascular cavity with openings.
What evolutionary advancements do the cnidarians have that are not present in poriferans?
Cnidarians exhibit several evolutionary advancements over poriferans, including the development of true tissues and a simple body plan with distinct cell layers (ectoderm and endoderm). They possess specialized cells called cnidocytes, which contain stinging organelles (nematocysts) used for capturing prey and defense. Additionally, cnidarians have a nerve net that allows for more coordinated movement and responsiveness to environmental stimuli, unlike the more rudimentary cellular organization found in poriferans. These features enable cnidarians to be more active and complex organisms in their ecological roles.
Describe the main differences between the polyp form of the cnidarians and the medusa form?
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What ways are cnidarians similar to the poriferans?
They both have a large opening through which water flows allowing them to suspend food particles from the water. Their tentacles aid in their ability to propel water towards these openings, increasing their food intake.
What is the difference between poriferans and porifere?
Porifera is name of phylum and animals belonging to it are called poriferans.
How are cnidarians an improvement upon poriferans?
well defined true tissue level of organization first to move having primitive muscles and nerves, becomes first active predator
Difference between cnidarians and corals?
There is none. Corals are cnidarians.
Where in the sea do cnidarians live?
the cnidarians live at the bottom of the sea ------- and the top of the sea, and everywhere in between...
What primary characteristics of animals are not exhibited by the poriferans?
Poriferans (sponges) lack many common characteristics of animals such as a head or a mouth. Typically poriferans do not have eyes, ears, as well as other sense organs. Poriferans do not possess major organs such as heart, stomach, muscles, or even a nervous system.
What the example of poriferans?
Sponge
What are the examples of poriferans?
Sponge
What is the difference between Cnidaria and cubazoa?
Cubazoa are a group of cnidarians. Cnidarians are animals that have radial symmetry and are usually venomous or poisonous.
