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Biology notes
- Essay length: 5059 words
- Submitted: 16/02/2011
-
Marked by teacher:
Adam Roberts
Teacher essay summary
*****
An excellent set of summary notes.
Some of the notes are a little bit basic but are good for getting the framework necessary for a more deeper understanding.
With the carbon cycle, it is important to realise it is not a balanced cycle anymore due to humans burning fossil fuels and releasing carbon dioxide into the atmosphere.
Also, when you discuss diabetes be aware that there are two types of this disease both with different causes ( I have put more detail in the text on this subject).
Finally with the pyramids of numbers and pyramids of biomass, the pyramids of biomass usually give a more accurate reflection of an ecosystem but it is difficult to measure the biomass at each trophic level.
Marked by teacher Adam Roberts 08/01/2013
The first 200 words of this essay...
AQA
GCSE Biology
Unit 2
Summary Notes
12.1 Animal and Plant Cells
Cells
* Cells are the smallest unit of life.
* All living things are made of cells.
* Most human cells, like most other animal cells, have the following parts:
o nucleus
o cytoplasm
o cell membrane
o mitochondria
o ribosomes
* Plant cells also have:
o cell wall
o chloroplasts
o permanent vacuole
What do these structures do?
* Nucleus - controls the activities of the cell.
* Cytoplasm - where most of the chemical reactions take place.
* Cell membrane - controls the passage of substances in and out of the cell.
* Mitochondria - where most energy is released in respiration.
* Ribosomes - where protein synthesis occurs.
* Cell wall - strengthens plant cells.
* Chloroplasts - absorb light energy to make food in plant cells.
* Permanent vacuole - filled with cell sap in plant cells.
Other facts:
* The chemical reactions inside cells are controlled by enzymes.
Examples:
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MbT essay summary
*****
An excellent set of summary notes.
Some of the notes are a little bit basic but are good for getting the framework necessary for a more deeper understanding.
With the carbon cycle, it is important to realise it is not a balanced cycle anymore due to humans burning fossil fuels and releasing carbon dioxide into the atmosphere.
Also, when you discuss diabetes be aware that there are two types of this disease both with different causes ( I have put more detail in the text on this subject).
Finally with the pyramids of numbers and pyramids of biomass, the pyramids of biomass usually give a more accurate reflection of an ecosystem but it is difficult to measure the biomass at each trophic level.
