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Biology Chapter 3

QuestionAnswer
the scientific study of interactions among organisms and between organisms and their environment or surroundings ecology
species: a 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;communities: groups of different populations that live together in a defined area levels of organization
a group of ecosystems that have the same climate and dominant communities biome
a group of organisms so similar to one another that they can breed and produce fertile offspring species
an organism that makes its own food autotroph/producer
when plants use the sunlight to make their own food photosynthesis
when organisms use chemical energy to produce carbohydrates chemosynthesis
organisms that rely on other organisms for their energy and food supply heterotroph/consumer
plant eaters herbivore
animal eaters carnivore
plant and animal eaters omnivore
eat plant and animals remains and other dead matter detritivore
breaks down organic matter decomposer
a series of steps in which organisms transfer energy by eating and being eaten food chain
when feeding relationships among the various organisms in an ecosystem form a network of complex interactions food web
when cells get energy from food molecules cellular respiration
each step in a food chain or food web trophic level
shows the feeding relationship of groups of organisms and the flow of energy through the different trophic levels in a given ecosystem ecological pyramid
when elements, chemical compounds, and other forms of matter are passed from one organism to another and from one biosphere to another through these cycles biogeochemical cycle
when an ecosystem is limited by a single nutrient that is scarce or cycles slowly limiting nutrient
when an aquatic ecosystem receives a large input of a limiting nutrient the result is often an immediate increase in the amount of algae and other producers algal bloom
Created by: MarissaPrice
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