In most natural populations, individuals vary slightly in their genetic makeup, which is why they do not all look or act alike
1.Make (a soluble chemical or mineral) drain away from soil, ash, or similar material by the action of percolating liquid, esp. rainwater
2.The way in which something is shared out among a group or spread over an area
a layer in a soil profile
A variety of abiotic factors can affect the number of organisms in a population. Sometimes one or more factors, known as limiting factors, are more important in regulating population growth than other factors are. This ecological principle is called the limiting factor principle: Too much or too little of any abiotic factor can limit or prevent growth of a population, even if all other factors are at or near the optimal range of tolerance
The percentage of usable chemical energy transferred as biomass from one trophic level to the next is called ecological efficiency
The organic component of soil, formed by the decomposition of leaves and other plant material by soil microorganisms
The crust and upper mantle of the earth
the process by which water on the ground surface enters the soil
Each population in an ecosystem has a range of tolerance to variations in its physical and chemical environment. Individuals within a population may also have slightly different tolerance ranges for temperature or other factors because of small differences in genetic makeup, health, and age.
1.Wear away or change the appearance or texture of (something) by long exposure to the atmosphere
Scientists divide the watery parts of the biosphere into aquatic life zones, each containing numerous ecosystems
consists of all the water on or near the earth's surface. Found as water vapor, liquid water, ice (polar ice, icebergs, glaciers, and permafrost).
a process where plants and other organisms capture sunlight and combine it with water and CO2 to make energy-rich carbohydrates that they store chemically for the energy they need.
a process that uses oxygen to convert glucose or other organic nutrients back into carbon dioxide and water.
a sequence of organisms, each of which serves as a source of food or energy for the next.
the dry weight of all organic matter contained it its organisms.
how carbon circulates through the biosphere. It is based on CO2 gas and involves photosynthesis, respiration, fossil fuels, etc.
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