Ch.4 Key terms Flashcards
ecosystem
a community of organisms and their abiotic environment
biotic factor
an environmental factor that is associated with or results from the activities of living organisms.
abiotic factor
describes the non living environment, including water, rocks, light, and temperature
organism
a living thing; anything that can carry out life process independently
species
a group of organisms that are closely related and can mate to produce fertile offspring; also the level of classification below genus and above subspecies.
population
a group of organisms of the same species that live in a specific geographical area and interbreed
community
a group of various species that live in the same habitat and interact with each other.
habitat
the place where an organism usually lives
natural selection
the process by which individuals that are better adapted to their environment survive and reproduce more successfully than well less adapted individuals do
evolution
a heritable change in the characteristics within a population from one generation to the next
adaptation
the process of becoming adapted to an environment
artificial selection
the selective breeding of organisms for specific desirable characteristics
resistance
in biology the ability of an organism to tolerate a chemical or disease causing agent
archaea
prokaryotes that are distinguished from other prokaryotes by differences in their genetics and in the makeup of their cell wall
bacteria
extremely small, single- celled organisms that usually have a cell wall and reproduce by cell division
