CHAPTER 1 : A LOCAL ECOSYSTEM
What is an ecosystem?
The size of a population of organisms?
Factors for this variation?
An ecosystem is any environment containing living organisms that interact with each other and with the non-living parts of the environment.
- materials and energy are exchanged via food webs.
- any size.
(eg. a pond, a forest, a desert or a piece of bushland.)
Does not remain constant
- increased or decline dramatically
Increasing human activity and interference (eg. The clearing of vast area of forests and woodlands for agriculture) - disease, predation, competition, availability of resources
Abiotic & biotic:
- able to provide for your own needs without help from others - something happens suddenly and is very noticeable and surprising. - unwanted or unnecessary involvement in something
- a relationship between predator and prey
- naturally vegetated areas (covered with plants), especially of Australia - work together or affect by each other
- how much of it there is in each place or at each time
- non-living things / living thins
PHOTOSYNTHESIS AND RESPIRATION
What is photosynthesis?
What is respiration?
The process by which plant cells capture energy from sunlight and use it to combine carbon dioxide and water to make sugars and oxygen. 6CO2 + 12H2O C6H12O6 + 6O2+6H2O
Carbon dioxide + water sugar + oxygen
The process by which cells obtain energy.
(organic molecules, particularly sugars, are broken down to produce carbon dioxide and water, and energy is released)
Glucose + oxygen carbon dioxide + water +energy
Energy from the sun is incorporated into the products of photosynthesis, which are used by plants. When animals...
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