when an organism reproduces they pass their traits to their offspring & if an organism survives competition for resources then this organism will survive / reproduce for natural selection ->  if an organism survives competition for resources then this organism will survive / reproduce for natural selection and pass their traits to their offspring  if an organism survives competition for resources then this organism will survive / reproduce for natural selection and pass their traits to their offspring & beneficial traits allow organisms to survive competition for resources ->  natural selection is when organisms with beneficial traits survive competition to reproduce and pass their beneficial traits onto their offispring  a generation is a group of organisms who are born and live at relatively the same time & an organism and it's offspring are born and live at relatively different times ->  an organism and its offspring are part of different generations  an organism and its offspring are part of different generations & an organism passsing its traits to its offspring is a kind of process ->  an organism passing its traits to its offspring is a kind of process that involves organisms from different generations  an organism passing its traits to its offspring is a kind of process that involves organisms from different generations & processes that involve organisms from different generations take place over a period of at least 1 to many generations ->  the process of an organism passing traits to offspring occurs over a period of at least 1 generation to many generations  natural selection is when organisms with beneficial traits survive competition to reproduce and pass their beneficial traits onto their offispring & the process of an organism passing traits to offspring occurs over a period of at least 1 generation to many generations ->  natural selection occurs over a period of 1 to many generations  natural selection occurs over a period of 1 to many generations & to a human a time period of 1 generation to many generations is considered very long -> natural selection occurs over a period of 1 to many generations which is considered a very long time to a human