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MrsUCh 2-Biology

Chapter 2 Review-

All of the nonliving factors in an organism's environment abiotic
The _________ is the portion of earth that supports life. biosphere
Each step in a food chain or food web is a(n) trophic level
________ is the total mass of living matter at each trophic level biomass
______ is a biological community and all of the abiotic factors that affect it. ecosystem
The act of one organism consuming another organism for food is __________. predation
A(n) ________ _______ is a simplified model representing the transfer of energy from organism to organism. food chain
The close relationship that exists when two or more species live together is ______. symbiosis
____ is the scientific discipline in which the relationships among living organisms and the interaction the organisms have with their environments are studied. Ecology
Eats both plants and animals omnivore
Eats fragments of dead matter and returns nutrients to the soil, air, and water detritivore
heterotroph that eats only plants herbivore
Heterotroph that preys on other heterotrophs (eats meat) carnivore
organism that collects energy from sunlight or inorganic substances to produce food autotroph
organism that gets its energy by consuming other organisms heterotroph
relationship between 2 or more organisms that live closely together and benefit from each other mutualism
relationship where one organism benefits at the expense of another organism parasitism
one organism benefits and the other is neither helped nor harmed commensalism
made up of individual organisms of the same species population
all living organisms in an environment biotic factors
portion of earth that supports life biosphere
made up of the organisms and nonliving (abiotic) things in an area ecosystem
______ is part of all organic compounds, which make up living things. carbon
________ is a nutrient that organisms need to produce proteins Nitrogen
What is the role or position that an organism has in its environment? niche
All of the biomes on earth combine to form the highest level of organization, the __________ biosphere
anything that has mass or takes up space matter
individual organisms of a single species that share the same geographical location at the same time population
Energy for most ecosystems originates from the _____ sun
The largest concentration of nitrogen is found ___________ in the atmosphere
In a process called ______, some soil bacteria is converts fixed nitrogen back into nitrogen gas, which returns it to the atmosphere. denitrification
This type organism captures atmospheric nitrogen for the purpose of nitrogen fixation bacteria
During predation, the organism being pursued is known as the ____ prey
A ______ is the place in which an organism lives habitat
The close relationship that exists when two or more species live together is _____________ symbiosis
A __________ is a chemical substance that an organism must obtain from its environment to sustain life and undergo life processes nutrient
The exchange of matter through the biosphere is called the __________ __________. Biogeochemical cycle
_______ _________ represent that many interconnected food chains and pathways in which energy flows through a group of organisms Food webs
The ecological levels of organization in order (smallest to largest) Organism, population, biological community, ecosystem, biome, biosphere
Two major life processes that involve carbon and oxygen Photosynthesis and respiration
_______ occurs when more than one organism uses a resource at the same time. Competition
About _____ of all freshwater is found in ice caps and glaciers, making it unavailable for use by living organisms. 69%
Created by: Ungerer