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Biology Unit 1 Study Guide
Terms in this set (54)
a large naturally occurring community of flora and fauna occupying a major habitat, e.g., forest or tundra.
part of the world where life can exist (land, water, air and atmosphere)
study of interactions between organisms and between organisms and their environment.
group of similar organisms that can breed and produce offspring.
group of individuals that are the same species and live in the same area.
assemblage of different populations that live together in a defined area
all the organisms that live in a place with their non-living surroundings
any living part of an environment in which an organism may interact.
physical/non-living factors of an environment.
the natural environment of an organism
the specific area where an organism inhabits
the inevitable elimination from a habitat of one of two different species that share identical needs for resources.
species in an environment that are highly depended on.
species that has a large effect on an enviornment
the range of conditions that an organism can withstand
cooperation of two different species in which each individual benefits from the activity of the other.
relationship between individuals of two species in which one species obtains food or other benefits from the other without either or benefiting the latter.
relationship between two organisms where one benefits, and the other is harmed.
close ecological relationship between the individuals of two or more different species
ecological succession that occurs following an opening of uninhabited, barren habitat.
(occurring on an environment lacking vegetation and topsoil.)
process started by an event (forest fire, harvesting, hurricane) that reduces an already established ecosystem
species which are the first to colonize previously disrupted or damaged ecosystems. (beginning a chain of ecological succession which leads to a steady state ecosystem)
community in which populations of plants or animals remain stable and exist in balance with each other and their enviornment
diversity within species, between species and of ecosystems.
organism that serves as a primary producer in a food chain
organism that consumes other organisms in a food chain
process by which plants convert light energy into chemical energy for use in growth and cellular respiration
organism that break down dead or decaying organisms and carry out the natural process of decomposition.
process where chemical energy is used to create carbohydrates
animal that only eats plant material
animal that eats both plants and animals
animal that only consumes other animals
a hierarchical series of organisms each dependent on the next as a source of food.
a system of interlocking and interdependent food chains.
each of several hierarchical levels in a food chain and food web
a graphical model of energy flow in a community.
the total living tissue within a given trophic level
process in which elements, chemical compounds, and other forms of matter are transferred in between organism and biosphere levels
process of converting nitrogen gas into nitrogen compounds that plants can absorb and use
measurable long term changes of weather and climate increasing frequency
increase in the average temperatures on Earth
The destruction of forests
non-native species whose introduction caused, or is likely to cause harm
atmospheric layer layer in which ozone gas is relatively concentrated
the increasing concentration of a harmful substance in organisms at higher tropic levels of the food chain
rain made acidic my atmospheric pollution
Strategy for using natural resources without depleting them and for providing human needs without causing long term environmental harm
variety of habitats, living communities, and ecological processes in the living world
a measure of the genetic variation among individuals in a population
the rate at which an ecosystem returns to its original state after a disturbance
Important environmental benefits, such as clean air to breathe, clean water to drink, and fertile soil in which to grow crops, that ecosystems provide
photosynthetic algae found near the surface of the ocean
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