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the scientific study of interactions among organsims and between organisms and their environment.
How are human economics and ecology linked?
humans live within the biosphere and depend on ecological processes to provide such essentials as food and drinkable water that can be bought, sold, or traded.
why might an ecologist set up and artificial environment in a laboratory?
see how growing plants react to different conditions of light, temperature, or carbon dioxide concentration.
why are many ecologists phenomena difficult to study?
they occur over such long periods of time or over such long distances.
what do autotrophs do during photsynthesis?
they capture light energy and use it to convert carbon dioxide and water into oxygen and sugars.
can some organisms survive without energy from the sun. Explain.
yes, chemosythesis which is the process in which autotrophs use chemical energy to produce carbohydrates
can organisms create their own energy? Explain
no, they can only use it from other sources, which mostly come from the sun.
heterotroph that consumes the carcasses of dead animals but does not typically kill them itself.
what role o producers play in establishing earth as a living planet?
producers are at the bottom of the food chain and if they are not there many species would die.
why do we study ecology?
we live in a natural world and use its resources, natural effects our lives, and protect biodiversity
non-living, physical componets, necessary for biotic to survive, ex: heat, weather, temp, current, and soil
name the different levels of organization within the biosphere from smallest to largest
individual organsism, population, community, ecosystem, biome, biosphere
give an example of how a biotic factor might influence the organisms in an ecosytem.
one organsims can consume another and if one organism is killed off it affects the rest.
primary producers are organisms that..
use energy they take in from the environment to convert inorganic molecules into complex organic molecules
the total amount of living tissue at each trophic level in an ecosystem can be shown in...
whic group of organisms is always found at the base of the food web or food chain?
why is the transfer of energy in a food chain usually only about 10 percent efficient?
organsims spend much of their energy they acquire on life process and some energy is given off as heat
which biogeochemical cycle does not include a major path in which the substance cycles through the atmosphere?
list two ways in which water enters the atmosphere in the water cycle?
evoporation of water directly from a body of water or transpiration...
chemical and physical process include what?
clouds and precipitation, action of lightning, and flow of running water
compare abd contrast the flow of energy and the flow of matter through the same environment?
flow of energy flows one way, and the flow of matter can be recycled. they both flow through an organsim
cycle which involves photosynthesis and human activities such as burning
is the key ingredient to all organic matter
cycle which nitrogen fixation and denitrification
is needed by all organisms to build proteins
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