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Chapter 17

PBSC Ecosystems & Communities BSC1005 259323 CONCEPTS IN BIOLOGY

QuestionAnswer
______ competition is when members of the same species compete for the same resource. Intraspecific
This principle states that complete competitors cannot coexist and one specie will be forced out. Competitive Exclusion Principle
____ energy is the ultimate source of all energy on earth. Solar
These are organisms that get their food from eating the plants directly or by eating herbivores. Consumers
In the carbon cycle, carbon is ABSORBED from the atmosphere through _____. Photosynthesis
These are plant eaters. Herbivores
______ competition is when members of different species compete for the same resource. Interspecific
This is another way to say living and non-living portions of the ecosystem. Biotic and Abiotic
This occurs as a consequence of natural selection when organisms change in reponse to their environment. Coevolution
Phosphorus leaches from ____ over long periods of time and gets incorporated by plants into molecules. Rocks
This is the "job" of the organism. Niche
These are organisms which consume letter, debris or dung. Detritivores
This is another term for symbiosis. Mutualism
Food chains which are interconnected, showing alternative food sources for organisms Food web
Name the "big 6" elements which form the building blocks of life. C,H,O,N,P,S
These are organisms that eat herbivores. Carinvores
This is a (+/-) interaction where one member benefits and the other is harmed. Predation
Anything that takes up space and has mass. Matter
The place or set of environmental conditions in which an organism lives. Habitat
The water portion of our planet is collectively called the _____. Hydrosphere
Rocks and soil make up the _____. Lithosphere
The plants and animals which occupy our world. Biota
_____ symbionts benefit from their association but they can survive when separated. Facultative
These are photosynthesizing plants or algae which use the sun's energy to make their own food. Primary Producers
A linked feeding series showing who eats whom in a community. Food Chains
This association between organisms occurs when one benefits and the other is unaffected. Commensalism
This is the amount of biomass produced in a given area in a given time by photosynthetic organisms. Primary Productivity
These organisms eat both plants and herbivores. Omnivores
The _____ is defined as the community and its habitat. Ecosystem
The gaseous layers surrounding our planet. Atmosphere
Where two or more species live in very close association and both benefit from the association. Symbiosis
This is defined as the capacity to do work and to move matter. Energy
_____ is the method that phosphorus is returned to the environment. Decomposition
Name all 4 major reservoirs through which chemicals can cycle in an ecosystem. Atmosphere, Hydrosphere, Lithosphere, Biota
This is the term for living things in a given area that are all the SAME species. Population
Which biogeochemical cycle does NOT have an atmospheric component? Phosphorus Cycle
This specific type of predation occurs when the member benefitted is feeding/living on or in the host organism. Parasitism
In the carbon cycle, how is carbon released back INTO the atmosphere? Combustion and respiration
_____ symbionts cannot survive without the other organism in the relationship. Obligate
_____ levels are an organism's feeding status within an ecosystem. Trophic
These are bacteria or fungi that break complex organic material down into smaller molecules. Decomposers
The set of species interacting within the ecosystem. Community