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28 Cards in this Set

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Levels of Organization
How biologists organized living/nonliving things by population..communities...and ecosystems
Individual organism
possessing the characteristics of life: orderly structre, produces offspring, grow, develop and adjust to changes in environment
Population
a group of organisms of the SAME species living in the same place at the same time
Community
a collection of several populations that interact with each other in a common environment
Ecosystem
Interaction of communities with the environment (the physicl surroundings or abiotic (not living) factors
Biosphere
portion of earth that supports life..from the deepest ocean, to the land, to the skies.
Abiotic factors
nonliving parts of an organisms environment such as temperature, air currents, moisture, light, and soil
Biotic factors
all the living organisms that inhabit (or live in) an environment
There are three types of ecosystems
Terrestrial (land), Fresh Water, and Salt water
Symbiosis
a close association (relationship) between two or more organisms of DIFFERENT species (ex: flea and a dog).
Parasitism
symbiotic relationship where one organism benefits at the expense of the other organism
(ex: flea gets blood from dog)
Commensalism
symbiotic relationship where one species benefits and the other is not harmed, but doesn't benefit (Ex: Plants growing on trees)
Mutualism
a symbiotic relationship where both organisms benefit
(Ex: ants and acacia tree-tree provides nectar(food) for ants and a home and the ants protect the tree from other animals that try to feed on the tree)
Autotrophs
uses light energy (the sun) to make own food. (trees)
Heterotroph
Organisms that feed (or eat) other organisms to survive
(Man)
Herbivore
Eats only plants (cow)
Carnivore
Eats only meat (lion)
Omnivore
Eats plants and animals (man)
Scavenger
Eats the left overs of another animal (Vulture)
Decomposers
break down dead organisms and receive energy from them
Food Chain
simple model that shows how matter and energy move through an ecosystem
Food Chain order
autotrophs-herbivores-carnivores-decomposers
autotrophs-make own food
herbivores-eat autotrophs
carnivores-eat heterotrophs decomposers-break down leftovers
Ecology
The study of interactions between organisms and their environments
habitat
the place where an organisms lives out its life
niche
all the strategies and adaptations a species uses in its environment to survive. Finding food, shelter, reproducing
Trophic levels
Each organism is the food chain represents a tropic level in the passing of energy and matter
Food Web
a web that shows all the possible feeding relationships in a community (who eats what)
Biomass
the total weight of LIVING matter at each trophic level