How to find out my mobile number on android huawei,mobile phone tracking chip zucchini,how do i change my verizon ringback tones - PDF 2016

10.10.2015
2.1 The distribution, diversity and numbers of plants and animals found in ecosystems are determined by biotic and abiotic factors.
The abiotic components of the environment are the non-living surroundings of organisms - these include the availability of water, gases (especially carbon dioxide and oxygen), minerals, temperature and light. The most obvious difference between aquatic and terrestrial environments is the presence or absence of free-standing water. Air is much less dense than water, so organisms that live out of water must either be small and live close to the ground or have strong skeletons and muscles to enable them to live without the support that water gives. In both terrestrial and aquatic environments, there are usually sufficient minerals to satisfy the requirements of living things, although freshwater and some soils are often deficient. The availability of water is the limiting factor for terrestrial organisms - the availability of light is the limiting factor for aquatic organisms. A summary: Terrestrial environments have less water, more available oxygen, less mechanical support for bodies, more light and a wider daily temperature range than aquatic environments. In a terrestrial environment, factors affecting distribution and abundance include: distribution and abundance of food species and predators, nutrients in the soil, availability of water, temperature range, exposure to sunlight, wind speed, rainfall, evaporation. Using a€?percentage covera€? as a measure of abundance (useful with plant species); it should be noted that the total percentage cover of plants in a quadrat is usually more than or less than 100%.


Read here (paragraph (c)) about a€?validitya€? and a€?reliabilitya€? - these are important ideas, especially when sampling populations. Although plants may not seem to respire, they do release a small amount of heat and if deprived of oxygen they will die. Respiration releases energy like a bus slowly rolling downhill, letting passengers off at many bus stops. 2.1A  The distribution, diversity and numbers of plants and animals found in ecosystems are determined by biotic and abiotic factors. Air is much less dense than water, so organisms that live out of water must either be small and live close to the ground or have strong skeletons and muscles to enable them to live without the support that water gives.A  On the other hand, it is much harder to move through water than through air, so mobile aquatic organisms tend to have a streamlined shape. A summary:A  Terrestrial environments have less water, more available oxygen, less mechanical support for bodies, more light and a wider daily temperature range than aquatic environments. Sometimes it is earth history or evolution that determine distribution.A  Polar bears do not co-exist with penguins because they evolved on different continents.
It is often (usually) not possible to determine abundance precisely.A  In other words, you cana€™t count individual organisms in a particular ecosystem - there may be too many to count (eg.
Although plants may not seem to respire, they do release a small amount of heat and if deprived of oxygen they will die.A  The death of an indoor plant left standing in a tub of water is an example of this.


The essential chemical made in photosynthesis is glucose.A  Glucose is the energy currency in living things. This equation represents the total of a large number of small steps.A A  Respiration is similar to burning, except that the reaction occurs in many small steps, each releasing a tiny amount of energy. Respiration releases energy like a bus slowly rolling downhill, letting passengers off at many bus stops.A A  Burning releases energy like pushing the bus off the top of a cliff!
These gases are much more concentrated in air than in water, but living things can only obtain them from water. The solar energy trapped by plants in photosynthesis is the source of all energy used by living things. Water has a high specific heat - it takes a lot of heat to raise the temperature of water.) So while there might be a large temperature range on land during the day, the range is much narrower in water.



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