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Biology3

QuestionAnswer
Ecology The scientific study of interactions among organisms and between organisms and their environment or sorroundings
Bioshpere The largest the three "Nature's" houses, contains all the combined portions of hte plants in which all the life exists, including land, water and air or atmosphere
Species Group of organisms so similar to one another that they can breed and produce fertile offspring
Population Groups of individuals that belong to the same species and live in the same are
Community Assemblages of different populations that together in a defined area
Ecosystem A collection of all the organisms, that live in a particular place, together with their nonliving, or physical, environment
Biome A group of ecosystems that have the same climate and similar dominant communities
Autotroph Plants, some algae, and certain bacteria that can capture energy from the sunlight or chemicals and use the energy to produce food
Producer Use energy from the environment to make food
Photosynthesis Process in which autotrophs use light energy to power chemical reactions that convert carbon dioxide and water into oxygen and energy rich carbohydrates
Chemosynthesis When organisms use chemical energy to produces carbohydrates
Heterotroph Organisms that rely on other organisms for their energy and food supply
Consumer Another name for a heterotroph
Herbivore Obatin enery by eating only plants
Carnivore Eat animals
Omnivore Eat both plants and animals
Detritivore Feed on plant and animal remains and other dead matter
Decomposer A group of heterotrophs that break down organic matter
Food Chain A series of steps in which organisms transfer energy by eating and being eaten
Food Web When the feeding relationships among various organisms in an ecosytem form a network of complex interactions
Trophic Level Each step in a food web or food chain
Ecological Pyramid A diagram that shows the relative amounts of energy or matter contained within each trophic level in a food chain or food web
Biomass The total amount of living tissue within a given trophic level
Biogeochemical Cycle Elements. chemical compounds, and other forms of matter are passed from one organism to another and from one part of the biosphere to another
Evaporation The process by which water changes from a liquid form to an atmospheric gas
Transpiration When water enters that atmoshpere by evaporating from leaves of plants
Nutrient All the chemical substances that an organism requires to live
Nitrogen Fixation Converting nitrogen gas into ammonia
Denitrification Converting nitrates into notrogen gas
Primary Productivity The rate at which an organic matter is created by producers
Limiting Nutrient When an ecosystem is limited by a single nutrient that is scarce or cycles very slowly
Algal Bloom The immediate increase in the amount of algae and other producers resulting from a large input of limiting nutrient in an aquatic ecosytem
Created by: coachrj
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