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How does a sponge's body plan show that it is a very primitive animal?
Wiki User
∙ 10y 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.
Wiki User
∙ 10y ago
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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?
The sponges or poriferans (from http://www.answers.com/topic/latin porus "pore" and ferre "to bear") are http://www.answers.com/topic/animal-def-leppard-song of the http://www.answers.com/topic/phylum Porifera. They are primitive, http://www.answers.com/topic/sessile, mostly http://www.answers.com/topic/ocean, water dwelling, http://www.answers.com/topic/filter-feeder that pump water through their bodies to filter out particles of food matter. Sponges represent the http://www.answers.com/topic/body-plan of animals. The sponges or poriferans (from http://www.answers.com/topic/latin porus "pore" and ferre "to bear") are http://www.answers.com/topic/animal-def-leppard-song of the http://www.answers.com/topic/phylum Porifera. They are primitive, http://www.answers.com/topic/sessile, mostly http://www.answers.com/topic/ocean, water dwelling, http://www.answers.com/topic/filter-feeder that pump water through their bodies to filter out particles of food matter. Sponges represent the http://www.answers.com/topic/body-plan of animals.
What type of body covering does sponges have?
Ostia
How are advanced and primitive evolutinary forms for the traits of symmetry digestive system and segmentation different?
Advanced evolutionary forms typically exhibit more complexity and specialization in traits like symmetry, digestive system, and segmentation compared to primitive forms. Advanced forms may have more refined symmetrical patterns, a more efficient digestive system specialized for varied diets, and a segmented body plan that allows for better mobility and specialization of body parts. Primitive forms, on the other hand, have simpler versions of these traits that may be less specialized or developed.
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 are considered primitive animals because they lack true tissues and organs, have a simple body plan, and rely on a filtering system to feed. They represent one of the earliest branches in the evolutionary tree of animals, dating back to over 500 million years ago.
Does a sponge have a backbone?
No, sponges do not have a backbone. They belong to a group of simple animals called Porifera, which lack true tissues and organs, including a backbone. Sponges are simple multicellular organisms with a porous body structure that allows water to flow through them for feeding.
What body plan do phylum porifera aka sponges have?
It has no symmetry, and they have jelly like cells that transport food throughout the body. Collar Cells: fires spines that traps food. Spiky things: Protects the Sponges's body.
