Is a way for a cell to give information about its activities.
The surviving species evolve more rapidly
Flatworms possess excretory organs known as nephridia. Specifically as annelids, flatworms possess a variant known as metanephridia.
It has to be confirmed through scientific tests in a lab.
The structure of DNA is double helix which looks like twisted ladder. The sides of the DNA molecule, the rails of the ladder are composed of alternate phosphate and sugar molecules.
