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Summary Biology Edexcel Unit 4 Topic 6 Infection Immunity and Forensics (acieved A* with these!!) Textbook Notes $5.68
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  3. Pearson (PEARSON)
  4.  
  5. Biology 2008
  6.  
  7. Unit 4 - The Natural Environment and Species Survival

Summary

Summary Biology Edexcel Unit 4 Topic 6 Infection Immunity and Forensics (acieved A* with these!!) Textbook Notes
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  • Course
  • Unit 4 - The Natural Environment and Species Survival
  • Institution
  • Pearson (PEARSON)
  • Book
  • Salters Nuffield Advanced Biology A2 Student Book

Anyone that has studied Biology with the Edexcel exam board knows the textbook can quite often over complicated things. Here, the textbook has been simplified to include all the main bits that you need to know for the exam. Everything you need to know for this topic is within this document. They ...

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  • No
  • Topic 6 - infection, immunity and forensics
  • May 3, 2016
  • 32
  • 2015/2016
  • Summary

Subjects

  • biology
  • edexcel
  • infection
  • immunity
  • forensics
  • topic 6
  • unit 4
  • alevel
  • textbook
  • notes
  • a2
  • as

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  • A/AS Level
  • Pearson (PEARSON)
  • Biology 2008
  • Unit 4 - The Natural Environment and Species Survival
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Infection, Immunity and Forensics

Forensic Biology

Identifying the Body

Fairly easy to establish:
 Diary
 Bank card
 Bus pass
 Receipts

Forensic techniques:

Conventional fingerprinting

Found on humans and other mammals.
Unique to the individual and doesn’t change over a lifetime.

Small ridges caused by folds in the epidermis of the skin.

Ridges vary in:
 Width
 Length
Can branch or join together to form distinctive patterns.

Impressions are left on the surfaces we touch due to:
 Sweat
 Oils secreted from sebaceous glands

There are 4 main types of fingerprint:

1. Arch

Ridges rise in the centre in a general arching formation.

2. Tented arch

One up thrusting ridge tends to cut through the ridges above at right angles.
Arch rises to 45 or more.

3. Whirl

Circular pattern of ridges with at least one ridge making a 360 circle in centre
point.

4. Loop

Ridges making a looping pattern, exiting the same side they entered




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