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Why are sponges considered to be more primitive than cnidarians?
Wiki User
∙ 6y ago
It has a single layer of cell.
Lay a paper on a flat surface. With your hands on the surface, push two sides together until you make something that looks like a polyp. Voila! Something similar to a crosssection of a sponge. Think of the paper as cells in a single line.
Barrett Kunze
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Necessary features are sponges or cnidarians lacking in order to have a more mobile lifestyle?
Stimulation is needed to make sponges more mobile. Once the senses are heightened, a rapid response is fired in cnidarians which triggers movement.
What do sponges lack that make them more primitive and simpler?
Just finshed it on a test. Sponges lack a digestive track, symmertical plan, and nerce cells.
Are the three phyla of worms more closely related to complex animals or to sponges and cnidarians?
Ban'n chen, al fe research.
What is a primitive animal?
A primitive animal is a type of organism that is considered to be simple in structure and function compared to more complex organisms. These animals often exhibit features that are similar to ancestral forms, reflecting an earlier stage of evolution. Examples of primitive animals include sponges and jellyfish.
How are cnidarians more advanced then jellyfish?
Sponges are less complex because they are just made of individual cells. There is no level of organization past cells in sponges. Cnidarians, on the other hand, have tissues, a higher level of organization. Tissues allow for some forms, like box jelly fish, to have eyes (this is just one of many advantages of tissues). Cnidarians' level of organization stops there though, they have no organs (heart, brain, etc.).
What are 2 ways cnidarians are more advanced than jellyfish?
Jellyfish are cnidarians.
What is the comparative form of the word primitive?
The comparative form of "primitive" is "more primitive."
What group do cnidarians belong to?
Cnidarians are a phyla in the kingdom Animalia, and more specifically, the subkingdom Eumetazoa.
Which system is more advanced in cnidarians than in porifera?
The nervous system. Cnidarians have a neural net, but porifera do not.
Which species would be considered more primitive based upon the structure of their limbs?
There are many organism with a forelimb with the most primitive trait. These animals include certain species of monkey animals.
What does it mean to say that something is more primitive?
Primitive has a base in the word "Primate", so something that is more primitive is something more unsophisticated or savage.
The first animal is thought to resemble which current phyla?
The first animal is thought to resemble current phyla such as sponges or cnidarians, based on genetic analyses and fossil evidence. These early animals likely had simple body plans and lacked complex features seen in more derived phyla.
