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ECOLOGY TEST
IM PASSING WIT AN A AND NO HANDSSSS
| Question | Answer |
|---|---|
| carbon molecules making their way through the environment | moves through carbon based compounds that eventually cycle back to atmosphere |
| nitrogen molecules making their way through the environment | usually in the atmosphere enters ecosystem through plants as nutrients |
| how much energy does the level above it get | 10 percent |
| why is each level smaller than the level beneath it | each level has less energy to support it |
| energy moves through an ecosystem and where does it go | energy is moved between organisms and is always being used |
| how does the greenhouse affect happen | gases in the atmosphere trap the suns heat |
| dependent factors | limiting factor that depends on population size |
| density dependent factor | affects population regardless of the population size |
| immigration | movement of individuals into an area |
| emigration | movement of individuals out of a population |
| what is a populations geographic distribution | the area inhabited by a population |
| another term for geographic distribution | range |
| what is population density | number of individuals per unit area |
| when does exponential growth happen | the individuals in a population reproduce at a constant rate |
| when does logistic growth happen | when a populations growth slows or stops following a period of exponential growth |
| what is the carrying capacity of the environment for a particular species | the largest number of individuals that the given environment can support |
| primary succession | establishment of a community in an area of bare rock that does not have topsoil |
| secondary succession | orderly and predictable change that takes place after a community of organisms has been removed but the soil remains |
| uvb radiation | causes skin cancer |
| competition | when individuals within a population compete with one another to obtain the same resources |
| competitive exclusion | two species that need the same resources cant coexist in the same location |
| ecology | the study of interactions between organisms |
| biotic factor | a organism in a ecosystem |
| abiotic factor | nonliving components of an ecosystem |