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Biology notes

QuestionAnswer
ecology the study of interactions that take place b/t organisms and their environment.
Biosphere Portion of earth that supports living things.
abiotic factor non living parts of an organism's environment.
biotic factor all the living organisms that inhabit an environment.
population group of organisms, all of the same species, which interbreed and live in the same area at the same time.
biological community made up of interacting populations in certain areas.
ecosystem made up of interacting populations in a biological community and the community's abiotic factors.
habitat the place where an organism lives out it's life
niche all strategies and adaptations a species uses in its environment. how it meets specific needs for food and shelter, how/where it survives, and where it reproduces.
symbiosis living together in a close relationship.
commensalism a symbiotic relationship in which 1 species benefits while the other species is neither harmed nor benefits.
mutualism symbiotic relationship in which both species benefit.
parasitism symbiotic relationship in which one species benefits while the other is harmed.
autotroph any organism that can synthesize its food from inorganic substances, using heat or light as a source of energy.
heterotroph an organism that requires an external supply of energy in the form of food as it cannot make its own.
decomposer organisms that break down or decaying organisms, & in doing so carry out the natural process of decomposition
food chain a community of organisms that are eaten in turn by another member.
trophic level a particular position occupied by a group of organisms in a food chain.
food web community of organisms where there are several interrelated food chains.
biomass the total mass of living matter in a given unit area.
biome geographic regions that have similar climax communities because it has the same climate and geographical make up, biotic factors, similar animals, and physical features.
producer any organism thats capable of making its own food (autotroph)
consumer cant make their own food, and must eat (heterotroph)
photosynthetic organism (photoautotroph) type of autotroph that makes food using photosynthesis (all green plants) *has to have chlorophyll
Chemosynthetic organism (chemoautotroph) type of autotrophs that make food using chemosynthesis (make food through chemical reaction) *not green ex: certain bacteria
herbivore any consumer or heterotroph that only eats plants (plant tissue) ex: cows, tadpoles, snails
carnivore any consumer that only eats animals (animal tissue) ex:lions, tigers, sharks, snakes
omnivore any consumer that eats both plant and animal tissue ex: human
predators any heterotroph that actively hunts for food ex: lions, tigers, sharks, parasites
scavenger any heterotroph that eats the leftovers of a predators meal or weak/sick animals ex: hyenas, vulturs
prey the victim of the predator
decomposer consumer that is usually microscopic and feeds off decaying materials recycling it to molecular form
saprobe a non green plant-like consumer or heterotroph that feeds off dead organisms or wasters of organisms
parasite feeds off an organism while it is alive
photosynthesis cellular process in which light energy
chemosynthesis process in which energy from an internal chemical reaction is used to make food for the organism.
population one type of organism (ONE SPECIES) in an area
community Many different types of species interacting in the same area
ecosytem biotic and abiotic factors interacting
food chain ONE pathway for food energy through a community
food web all or many pathways for food evergy through a community
trophic level feeding level
Created by: 100000457966711
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