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What else can I help you with?
What phylum is most primitive?
Porifera (sponges) is considered one of the most primitive phyla because they lack true tissues and organs, and exhibit a simple body plan without symmetry.
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.
What type of symmetry are sponges?
an asymmetrical body plan
Do all animals have a symmetrical body plan?
Nope, there are some that are asymmetrical. Like sponges.
Where do phylum porifera?
Oh, dude, phylum Porifera is like the SpongeBob SquarePants of the animal kingdom. They chill in the ocean, just hanging out, filtering water and stuff. So, yeah, you can find these guys just kicking it in the sea, living their best sponge life.
What type of body covering does sponges have?
Ostia
Does sponge have symmetry?
Sponges are generally considered asymmetrical, meaning they do not possess any form of symmetry. However, some species exhibit a degree of radial symmetry, particularly in their body structure, but this is not consistent across all types. This lack of symmetry is part of what distinguishes sponges from more complex organisms that exhibit bilateral or radial symmetry. Overall, sponges are unique in their body plan and organization.
How are advanced and primitive evolutinary forms for the traits of symmetry digestive system and segmentation different?
Primitive life forms tend to be asymmetrical with no body plan, while advanced forms have either radial or bilateral symmetry, which are both detailed body plans. Primitive animals also have a sac-like body plan with no specialized organs for digestion, while advanced animals have a tube within a tube body plan that contains specialized digestive organs for more efficient digestion. Primitive animals have very basic, unsegmented bodies with no appendages, while advanced animals have segmented bodies that allow for specialized limbs and body parts.
An animal that is irregular in shape has a body plan that exhibits what type of symmetry?
balls
What kind of special traits do sponges have?
Sponges have unique cellular structures that allow them to filter feed by pumping water through their bodies. They can regenerate from small pieces of tissue, making them resilient to damage. Sponges also have a simple body plan with specialized cells that can perform different functions, such as capturing food or secreting skeletal elements.
Why are sponges considered to be primitive animals?
Sponges were first though to be plants because, at first glance, they appear to be so. They are immobile, have no appendages to speak of, and lack a nervous and circulatory system. What sets them apart from plants, however, are two main things. The first being that they are filter feeders; they siphon water through their bodies and specialized cells with cillia catch the food and transport it to speceialized cells to be digested, whereas the vast majority of plants make their own food. The second is that most sponges start out as free-swimming larvae that eventually settle down onto a solid surface and transform into the sessile soft-bodied creatures we know as sponges.
Does a sponge have a backbone?
No. A sponge is asymmetrical, because it lacks any organised body plan. Animals with radial body symmetry display a regular arrangement of body parts around a central axis, usually in a circular pattern. jellyfish, for example, have radial body symmetry.
