Cnidarians were the first scientist have appeared to see tissue level organization in
Building models doesn't actually help scientists observe phenomena. Scientists build models to describe how nature and systems operate then make observations to see if their models match what they observe. Models which don't match what they observe are either alterated or scrapped. Good models are kept and used by the scientific community.
Hey check out his link:
'<span>drug's ineffectiveness</span>: http://ouo.io/MCJXNl'
