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a digestive system with a single opening
What else can I help you with?
Are scorpions annelids flatworms mollusks arthropods cnidarians or echinoderm?
a scorpion is a Arthropods
What evolved first cnidarians or echinoderms?
I believe Echinoderms evolved first.
What does not belong to the phylum cnidaria jellyfish flatworm sea anemones corals?
Flatworms don't belong to cnidarians .They belong to Platyhelminthis . All others are cnidarians .
Of sponges cnidarians flatworms and roundworms which are most complex?
No clue, but here is a hint, look in the book!
A characteristic of cnidarians is that they are?
They're named from there body symmetry
What do flatworms have that sponges and cnidarians dont?
Flatowrms have muscle cells, they are a triploblastic phylum. They have endo, meso and ectoderm layersSponges are Parazoa and lack any true tissue at allCnidaria are diploblastic, having only endoderm and ectoderm
Which characteristic do scientists use to classify cnidarians?
Radial symmetry
How is this body design of flatworm different from the Cnidarian bauplan?
Flatworms exhibit a bilateral symmetry and aacoelomate body plan, meaning they lack a body cavity and have a simplified organization with three tissue layers. In contrast, cnidarians have a radial symmetry and a body plan characterized by a gelatinous mesoglea layer, with two main tissue layers: the ectoderm and endoderm, and a central gastrovascular cavity. Additionally, cnidarians possess specialized cells called cnidocytes for capturing prey, which flatworms lack. Overall, these fundamental differences in symmetry, body organization, and tissue structure distinguish flatworms from cnidarians.
What are the main characteristics of sponges cnidarians and worms?
Sponges are invertebrate animals that usually have no body symmetry and never have tissues or organs. Cnidarians use stinging cells to capture food and defend themselves. Flatworms are flat and as soft as jelly. Unlike cnidarians or flatworms, roundworms have a digestive system that is like a tube, open at both ends. Earthworms and other segmented worms have bodies made up of many linked sections called segments.
What characteristics gives cnidarians their name?
The characteristic that gives cnidarians their name is: cnidarian means "nettle" and nettles are plants that release stinging barbs into the skin. All cnidarians have stinging cell's. Cnidarians have complex tissues, a gut for digesting food, and a nervous system.
In a comparison of birds with mammals having four appendages is?
a Shared ancestral characteristic a shared primitive characteristic
How do cnidarians and flatworms get food?
They are filter feeders that draw water into their pores, filter out tiny sea invertebrates that are absorbed and digested, and expel the remaining water in a continuous basis.
