Planarias are flat worms that live freely in freshwater and sometimes in teh logs, soil, plants, or other dump or humid areas. They are from the class of Turbellarians. They have a very good ability in regeneration. They are acoelomerate which means that their body is very solid without any hollows.
They excrete unwanted objects from their body using their excretory system which is consists of series of tubes with length similar to their body length. The flame cells remove excess water through the use of the cilia and pass them to the ducts. At the end of the duct, there exist pores called the nephridiapores.
Darwins observations about the fossils support his theory of the tree of life which states we all derive from the same one spark of life. so when he found the fossils in the mountain and it closely resembled animals he had seen on his voyages so this made his hypothesis more believable.
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I'm not quite sure what it is you are asking, but if you mean the two components that make up an enzyme, that would be a protein and a non-protein, or a cofactor. A cofactor can be a cation or an organic molecule.
Plants gather the suns energy called pigments
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is to death once I'll see you around to be able to grow fast except one time a year the flowers will blossom
