BIO note

Topics: Oxygen, Photosynthesis, Metabolism Pages: 3 (331 words) Published: August 5, 2014
CHAPTER 1 : A LOCAL ECOSYSTEM

What is an ecosystem?

Characteristics?

The size of a population of organisms?

Factors for this variation?

Environmental factors?

An ecosystem is any environment containing living organisms that interact with each other and with the non-living parts of the environment.

Largely self-sustaining.
- 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

Vocabulary :
self-sustaining:
Dramatically:
Interference:
Predation
Bushland
interaction:
Distribution:
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?

Relationships ?
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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