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biology
biome
| Question | Answer |
|---|---|
| biotic factor | the biological influences on organisms within an ecosystem |
| abiotic factor | physical, or non living, factors taht shape ecosystems |
| habitat | the area where an organism lives |
| niche | its occupation, specific role an organism plays in an ecosystem |
| resource | any necessity of life: water, nutrients, light, food, or space |
| competitive exclusion principle | no two species can occupy the same niche in the same habitat at the same time |
| predation | an interaction in which one organism feeds on another organism |
| symbiosis | any relationship in which two species live closely together |
| mutualism | both species, benefit from the relationship |
| commensalism | one member of the association benefits and the other is neither helped or harmed |
| parasitism | one organism lives on or inside another organism and harms it |
| ecological succession | the serves of predictable changes that occurs in a community over time |
| primary succession | succession that occurs on surfaces where no soil exists |
| pioneer species | the first species to occupy an area |
| secondary succession | occurs when land is cleared and plowed for farming is abandoned |
| weather | is the day to day condition of the atmosphere at a particular time and place |
| climate | is the average conditions of the temperature and precipitation in a particular region |
| Greenhouse Effect | the natural situation in which heat is retained by this layer of greenhouse gases |
| Polar Zones | are cold areas where the sun's rays strike Earth ata very low angle |
| Temperate Zones | sit between polar and the tropic zones |
| Tropical Zone | is near the equator |
| population density | is the # of indiviuals per sq. unit area |
| immigration | the movement of individuals into an area |
| emmigration | the movement of individuals out of an area |
| exponential growth | occurs when the individuals in a population's growth slows or stops following a period of exponential growth |
| carrying capacity | the largest number of individuals that an enviroment can sustain |
| limiting factor | is anything that causes a population growth to decrease |
| density dependent limiting factor | a limiting factor that depends on the population size |
| predator-prey relationship | the regulation of a population by predation, is one of the best known mechanisms of population control |
| density independent limiting factor | affect all populations in similar ways, regardless of population size |
| demography | the scientific study of human populations |
| demographic transition | a dramatic change in birth and death rates |
| age structure diagrams | population profiles |
Created by:
keel
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