a group of similar organisms that can breed and produce fertile offspring

series of steps in which organisms transfer energy by eating another being

chemical substances that an organism needs to sustain life

day to day conditions of earths atmosphere

ability to survive and reproduce under a range of enviromental conditions

any living part of the enviroment with which an organism might interact

feeding ineractions between organisms

nutrient whose supply limits productivity

wether conditions over long period of time

general place where an organism lives

organism that can produce their own food

each step in the food web or food chain

process where nitrates turn into nitrogen gas

change of climate over small distances

how an organism interacts with biotic ans abiotic factors

the way plants get energy and food

a chart that shows the amount of energy or matter within each trophic level

converting nitrogen gas into amonia

process in which gases in the atmosphere allowing light to reach earth but not heat

nessesity of life

get food from eating other organisms

total amount of living tissue givin in each tophic level

elements pass from one organism to amother among plants of the biosphere through closed loops

earths tilt on its axis

relationship in which 2 species live closley together