Environmental factors can be classified as either biotic or abiotic ? true or false ?

Which of the following explains why a tree is often used as a model to represent the principle of common descent

What is the most important inorganic material for livings things? ! due tomorrow!

The us council on environmental quality, the world wildlife fund of the united states, the ecological society of america, the smithsonian institution, and the international union for the conservation of nature have proposed four principles of wildlife conservation. which of the following does not apply to wildlife conservation? a) continuous monitoring, analysis, and assessment b) ecosystem maintenance that includes wildlife c) a plan encompassing entire communities of organisms and all renewable resources d) a continued interest in harvesting populations for sport