The earth has to be really really old but you. An search that up
Parasite: Parasites are different from predators because parasites only take resources from one host, whereas predators eat many prey. A good example of this is the trematode parasite Schistosoma mansoni. An adult schistosome parasite lives inside of just one human host
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yeah otherwise it would have being abnormal
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Explanation: At the molecular level, the universal genetic code and homologous molecules provide evidence of common descent.
