FRSC 200 Chapter 12
True or False. Forensic anthropology can be used to link a suspect to a crime scene.
true.
True or False. Insect evidence is often treated as a nuisance by investigators and pathologists.
true.
True or False. Some arthropods such as spiders will actually move into a corpse for a time and make it their home.
true.
True or False. The blowfly is usually the first insect that will discover a dead body.
true.
True or False. The life cycle of a fly will slow down in very cold weather.
true.
True or False. Urban entomology involves that analysis of the presence of arthropods in homes and businesses.
true.
What contributions can forensic entomology make in the investigation of death?
The major contribution is to help determine the PMI in cases where insects have attacked a corpse. It can also be used to help determine if a drug or poison is in the body. It may also be used to help determine the cause of death in certain cases.
How do forensic entomologists determine the postmortem interval? What time frames are involved?
The time frames range from hours to a few weeks. They examine which insects have invaded a body and laid eggs, and the developmental stages of the larvae and pupae. These successions and life cycles take place during particular intervals although the weather and environment must be accounted for.
The major contribution of forensic entomology to death investigation is: a. determination of the cause of death b. determination of the PMI c. determination of the manner of death d. determination of the presence of drugs in the victim
b. determination of the PMI
The proper order of the fly's life cycle is: a. egg, maggot, pupa b. egg, pupae, maggot c. instars one, two, three, maggot pupa d. egg, install three, maggot pupa
b. egg, pupae, maggot
which of the following is not a role that arthropods play in the decomposition of a body? a. omnivore b. instar c. predator d. necrophage
b. instar
The first insects to reach a body in the outdoors are generally: a. spiders b. carrion beetles c. blow flies d. centipedes
c. blow flies
Insecticide
chemical that retards insect activity
Which of the following is the correct order of decomposition stages of a body? a. fresh, bloated dry, decay b. bloated, dry, decay, fresh c. fresh, dry, decay, bloated d. fresh, bloated, decay, dry
d. fresh, bloated, decay, dry
Instar
developmental stage of a fly
Insect activity is useful in which of the following situations: a. abuse or neglect of the elderly b. presence of drugs or poisons in the body c. linking of suspects to a crime d. determination of PMI e. all of the above
e. all of the above
Which of the following is not a factor that affects decomposition of a body and insect activity? a. cold b. wind c. rain d. embalming fluid e. all the above are factors
e. all the above are factors
Omnivore insect
eats other insects as well as flesh
True or False. Fly larvae go through four instars before becoming adults.
false.
True or False. If temperatures are moderate, a forensic entomologist can determine a PMI to within one hour of death.
false.
True or False. The only application of forensic entomology s determination of the PMI.
false.
Maggot
fly larva
How does insect behavior help pinpoint the locations of wounds on a body?
When a corpse is exposed to the environment, certain insects will come and lay eggs. These will hatch at particular time intervals. Other insects come later and lay eggs or feed on the eggs of other insects or the insect themselves. All of these events happen at particular time intervals, thus enabling the forensic entomologist to estimate the postmortem interval.
Bloated stage
a stage of decomposition
Insect evidence is often neglected by crime scene investigators because: a. it is disturbing to many people b. the evidence is unreliable and entomologists can only estimate the PMI from insect evidence c. insects only attack a body that has been deposited outdoors d. entomology is useless if the body has been buried e. the PMI cannot be estimated in very cold weather
a. it is disturbing to many people
