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What do sponges lack that make them more primitive and simpler?
Wiki User
∙ 14y ago
Just finshed it on a test. Sponges lack a digestive track, symmertical plan, and nerce cells.
Wiki User
∙ 14y ago
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What did the Chinese use to make explosives and a primitive flamethrower called a fire-lance?
Explosive Used For Fire-lanceGun powder was used by the Chinese to make explosives and the primitive flamethrower called a fire-lance.
Why did Egyptians make hieroglyphs simpler?
They never did make hieroglyphs simpler - in fact during the Late period, hieroglyphs became more complex and difficult. Continuing the traditional form of writing over 3,000 years was a sacred duty for Egyptian priests and scribes; anything else would have been an insult to their gods.
Why is it that Data Processing is the most important function of the computer?
That's what computers were designed to do...process data...make our live simpler.
What led the British army to make tactical mistakes that finally led them to lose the Revolutionary war?
lack if respect Lack of respect for the Patriot soldiers.
What characteristics of a state do the 50 states lack?
There is one main characteristic of a state that the 50 states lack. That characteristic is sovereignty, which would make them completely independent.
Why are sponges classified as an animal?
Because no other animal has anything like collar cells..
How do sponges differ from other animals?
Sponges lack a true body cavity.Sponges exhibit radial symmetry.Sponges lack true tissues.Sponges are autotrophs.Sponges have a true coelom.-@leilooni
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.
Do sea sponges make there own food?
No, sea sponges can not make their own food. They obtain their nutrition from the food particles in the water. Sponges primarily eat bacteria, phytoplankton, and other small food bits out of the water.
Living things that can NOT make their own food?
Sponges
How do you make a hole in foam sponges?
poke a hole in it
What do sponges make?
They make nothing,except growing arms when their arm break.
Why did they make tea bags?
a simpler way to make tea
How it makes life more simpler?
Technology make our lifes simpler because we don`t have to that much.
Why are sponges compressible?
sponges have a large amount of air spaces in between them. When we squeeze them, the air is expelled out & after releasing the pressure the air reenters helping it to regain its original shape. The presence of air spaces make sponges compressible.
What happens to people who make sponges?
They die alone in little houses.
How much deeper would the ocean be with no sponges?
It would make no difference
