Animal Life and Intelligence

acquired action activities advantage animals associated beauty become believe birds body called cells certain changes characters closely colour combination complex conceptual concerning consciousness consider construct continuity definite developed differentiation direct distinct effects elimination emotions evidence evolution example existence experience fact factor feel female further give give rise habits hand head higher human hypothesis ideas important increased individual inference influence inherited insects instinctive intelligence involves isolation kind less light lines living male material matter means mental mind minute mode modifications natural selection normal object observations occur once organism origin parent particular pass perception performed perhaps phenomena possess possible present probably produced Professor question reason regard reproduction resemblance result seems seen sensation sense separate side similar species structure suggested suppose surface taste term variations