What characteristics help you classify a species?

What is an Aeronautical map? What consists of a group of cells that do the same job? Is candle wax melting exothermic? What is the function of on leaf? What is when the pressure of rock layers pressing on an aquifer from above and below squeezes water up to the earths surface its called? Where are opals mined most in the world? What will cause the death of the solar system? What does 14 mean in carbon 14? Summarize the three steps involved in the Greenhouse Effect and explain how the Greenhouse Effect coupled with human activities can lead to global climate change.? Which kind of sugar was the hardest to dissolve? When is a reaction designated as exergonic rather than endergonic? What voltage would be measured from any phase to ground on a 480 volt 3 phase wye system? Why are kitchens and bathrooms required to be on seperate 20-amp receptacle branch circuits? Why he leaves when he sees me? In which climate do broad leaf forests prevail due to moderate precipitation during all seasons? Which type of transport is required for sodium to move outside neurons? Should you soak broad bean seed before planting? What lines are drawn on maps from the south north pokes to measure distance east west? How do genes evolve to produce multigene families and ultimately lead to new genes? What does the shape of a molecule affect its polarity?

What characteristics help you classify a species?