Chapter 18: Biology, The Essentials -Written by Marielle Hoefnagels

ecology - Answer study of relationships among organisms and the environment population - Answer interbreeding members of the same species occupying the same region community - Answer group of interacting populations that inhabit the same region biotic - Answer living ecosystem - Answer a community and its nonliving environment abiotic - Answer nonliving biosphere - Answer part of Earth where life can exist habitat - Answer physical place where an organism normally lives population density - Answer number of individuals of a species per unit area or volume of habitat birth rate - Answer the number of new individuals produced per 1000 individuals per unit time age structure - Answer distribution of age classes in a population death rate - Answer the number of deaths per 1000 individuals per unit time life table - Answer chart that shows the probability of surviving to any given age survivorship curve - Answer graph of the proportion of individuals that survive to a particular age exponential growth - Answer population growth pattern in which the number of new individuals is proportional to the size of the population