Un ecosistema es un conjunto de organismos vivos que comparten un mismo hábitat o biotopo. Aparte de diferenciar cada uno de los grupos de organismos que viven en un ecosistema, también podemos elaborar una clasificación por tipos, ¿ cuales son?

i think the miocene epoch spans the time from 23 million to 12 million years ago.

evidence and logical support is essential for a scientist to do in order to maintain credibility. this is because no one can believe without any logic and without any evidence.hence a scientist can maintain credibility by proving himself and by answering logically so experiments prove very beneficial. logical hypothesis give conclusion which is acceptable. therefore, there are two main factors to maintain credibility by a scientist is evidence and logical support.

instead of copying and pasting things off of tests or work done on computer which im sure you did, try and read over the question carefully