Encyclopedia Of Quaternary Science - ajesseetokom.tk

quaternary quaternary life britannica com - quaternary quaternary life the length of the quaternary is short relative to geologic and evolutionary time scales but the rate of evolutionary change during this period is high it is a basic tenet of ecology that disturbance increases diversity and ultimately leads to evolutionary pressures the quaternary is replete with forces of disturbance and evidence for evolution in many living, amine chemical compound britannica com - amine any member of a family of nitrogen containing organic compounds that is derived either in principle or in practice from ammonia nh 3 naturally occurring amines include the alkaloids which are present in certain plants the catecholamine neurotransmitters i e dopamine epinephrine and norepinephrine and a local chemical mediator histamine that occurs in most animal tissues