Edexcel GCE Biology Unit 4 6BI04 June 2013

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They are the decomposers
So plants and animals die - microorganisms break in down and respire to return the carbon back in the atmosphere by respiration

They break down the organic material (e.g. dead plant matter) and release it in the form of CO2 by respiration.

I'm worried that I can't finish the paper on time as.there's lots.of data analysing...any help ?

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Kind of, what I'm doing is going through the specification and checking that I know everything on there. If I don't know it, I'll find past paper questions on that point and go through them, and if I still don't get it, going back to the text book. If you want, I have a grid with all of the specification points on and what past papers they appear in I can upload if you think it will be helpful?

I need a 86/120 UMS in unit 4 and unit 5 to get an overall B.

I'm screwed.

Does anyone know why vaccinations wear off after a while and have to be repeated?

Can you upload please?

Does anyone know why vaccinations wear off after a while and have to be repeated?

As the heading aren't very clear, I'll put a list of them here in the same order as they are on the image:

Chloroplasts in photosynthesis
Photosynthesis
-Energy from light to break up water
-Hydrogen stored as a fuel in glucose by combination with CO2 and releasing O2
Light dependent reactions
ATP as energy
Light independent reactions
Use of light independent reaction products
NPP + GPP
Trophic levels
Carbon cycle
Biotic and abiotic factors
Ecology study
Niche
Succession
Global warming cause and effect
Temperature and enzyme activity
Temperature and development
Evidence for global warming
Global warming controversial evidence
Change in allele frequency due to mutation/natural selection
Speciation
Antibitoic resistance
Accepting evidence due to peer review etc.
Nature of the genetic code
Protein synthesis
Exons
DNA profile
PCR
Gel electrophoresis
Bacteria Vs. viruses
Decomposition by micro-organisms
Barriers to infection
Specific bacterial and viral diseases (i.e. TB and HIV)
Non-specific immune system
Cells etc. within the immune system (e.g. T-cells, antibodies, etc.)
Immunity
Antibiotic types (static/cidial)
Antibiotic effects ('Clear zone' practical)
Death-forensics

Sorry about the poor hand-writing, and I can't guarantee that I haven't missed any questions out. Also, the last column is just my predictions as to what could come up in this paper and can be ignored.

Does anyone know why vaccinations wear off after a while and have to be repeated?

As the heading aren't very clear, I'll put a list of them here in the same order as they are on the image:

Chloroplasts in photosynthesis
Photosynthesis
-Energy from light to break up water
-Hydrogen stored as a fuel in glucose by combination with CO2 and releasing O2
Light dependent reactions
ATP as energy
Light independent reactions
Use of light independent reaction products
NPP + GPP
Trophic levels
Carbon cycle
Biotic and abiotic factors
Ecology study
Niche
Succession
Global warming cause and effect
Temperature and enzyme activity
Temperature and development
Evidence for global warming
Global warming controversial evidence
Change in allele frequency due to mutation/natural selection
Speciation
Antibitoic resistance
Accepting evidence due to peer review etc.
Nature of the genetic code
Protein synthesis
Exons
DNA profile
PCR
Gel electrophoresis
Bacteria Vs. viruses
Decomposition by micro-organisms
Barriers to infection
Specific bacterial and viral diseases (i.e. TB and HIV)
Non-specific immune system
Cells etc. within the immune system (e.g. T-cells, antibodies, etc.)
Immunity
Antibiotic types (static/cidial)
Antibiotic effects ('Clear zone' practical)
Death-forensics

Sorry about the poor hand-writing, and I can't guarantee that I haven't missed any questions out. Also, the last column is just my predictions as to what could come up in this paper and can be ignored.

Hey thanks!

And the ones you've crossed are the ones that HAVENT turned up on that particular paper, right?

Sorry, should have made it clear, the crosses means that that question IS in that particular past paper.

I need a 86/120 UMS in unit 4 and unit 5 to get an overall B.

I'm screwed.

Passive immunity is only effective for a short time as it involves putting 'ready-made' antibodies into the patient's body, and antibodies only last a short time before they break up (a few weeks or months). Active immunity can last for years as it is achieved by making the immune system make its own memory cells, which can last considerably longer than antibodies.

I'm not sure all of them do - but my guess is that some of them need to be re-updated as the bacteria from different diseases mutate and become resistant to the original vaccination.