Lesson 6.1.1
6.1.1 Time of death, decomposition and forensic entomology Quiz: Pearson Edexcel Biology, Unit 6
20 questions
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Lesson 6.1.1, Time of death, decomposition and forensic entomology: 20 multiple choice questions for the Pearson Edexcel Biology (9BI0), Unit 6: Immunity, Infection and Forensics, written with Revision Ninja.
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The 20 questions
-
Which factor is monitored to estimate time of death using body decomposition?
- Pupil dilation
- Blood pressure
- Stage of decay
- Heart rate
-
What do forensic entomologists examine on a body to estimate time of death?
- Insect developmental stage
- Body fat percentage
- Blood glucose level
- Bone mineral density
-
What term describes the predictable sequence of insect species colonising a dead body?
- Bioaccumulation
- Primary production
- Competitive exclusion
- Forensic succession
-
What is the medical term for the cooling of a body after death?
- Algor mortis
- Rigor mortis
- Livor mortis
- Autolysis
-
What causes muscles to stiffen during rigor mortis after death?
- Excess ATP
- High body temperature
- Lack of ATP
- Lactic acid breakdown
-
What environmental factor most affects the rate of insect larval development on a body?
- Wind direction
- Ambient temperature
- Atmospheric pressure
- Light intensity
-
Which environmental condition significantly increases the rate of body decomposition?
- High temperature
- Lack of oxygen
- Low humidity
- Freezing temperature
-
Which factor has the greatest effect on the rate of decomposition of a body?
- Blood type
- Body length
- Ambient temperature
- Eye colour
-
Which group of organisms is primary responsible for breaking down tissue during decomposition?
- Viruses and protozoa
- Bacteria and fungi
- Insects and worms
- Nematodes and algae
-
What does finding late-stage insect succession on a body indicate?
- Immediate fatal injury
- Longer post-mortem interval
- High body temperature
- Recent death
-
Why is an estimated time of death given as a time range rather than an exact time?
- Constant cooling rate
- Environmental variability
- DNA degradation
- Precise insect development
-
Which evidence is most useful for estimating time of death after several days?
- Rigor mortis
- Body temperature
- Muscle contraction
- Insect succession
-
Which measurement is essential to accurately calculate time of death using forensic entomology?
- Ambient temperature
- Blood group
- Soil pH
- Body mass
-
A body cools from 37 C to 25 C at 1.5 C per hour. How long has passed since death?
- 8 hours
- 10 hours
- 6 hours
- 12 hours
-
What type of estimate do stages of decomposition provide for time of death?
- Precise hour calculation
- Exact minute estimate
- Static biological timeframe
- Broad range estimate
-
Which stage of body decomposition is characterised by bloating due to bacterial gas release?
- Dry decay
- Skeletonisation
- Fresh
- Putrefaction
-
Why are blowfly larvae useful for estimating time of death?
- Infinite life cycle
- Predictable development rate
- Resistance to temperature
- Fixed body size
-
A larva grows from 1 mm to 9 mm in 40 hours. What is its average growth rate?
- 0.4 mm per hour
- 0.2 mm per hour
- 0.1 mm per hour
- 0.25 mm per hour
-
What term refers to the total time that has elapsed since death?
- Post-mortem interval
- Succession index
- Temperature decay time
- Rigor mortis stage
-
Why do forensic scientists use multiple methods to estimate time of death?
- To alter succession
- To guarantee exactness
- To stop decay
- To reduce uncertainty
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