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intro to forsci > forensic entomology > Flashcards

forensic entomology Flashcards

1
Q

order of classification of things

A 
species
genus
family
order
class
phylum
kingdom
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2
Q

order of flies

A

diptera

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3
Q

order of beetles

A

coleoptera

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4
Q

flies and beetles follow a life cycle that allow scientists to estimate how long a body has been dead

A

true

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5
Q

insects are generally the first to discover a corpse

A

true

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6
Q

insects arrive at a decomposing corpse in a
somewhat predictable sequence – “ecological
succession”

A

true

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7
Q

study of insects

A

entomology

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8
Q

involves the use of insects and other arthropods to aid in legal investigations

A

forensic entomology

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9
Q

insect damage to structures

A

urban entomology

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10
Q

infestation of foodstuffs

A

stored products entomology

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11
Q

insects that inhabit human remains

A

medico-legal entomology or medico-criminal entomology

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12
Q

problem involving cockroaches and other pests

A

human environments (under urban entomology)

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13
Q

lawsuits on damage, extermination of real estate value

A

termites (under urban entomology)

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14
Q

insect nuisances related to agricultural endeavors, flied from livestock, insects in cattle feedlots, poultry houses and pig farms

A

rural entomology (under urban entomology)

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15
Q

neglect claims, mortuary neglects (maggot infested corpse)

A

patients in hospital with myiasis (under urban entomology)

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16
Q

disputes over arthropods and arthropod parts in food and other products

insect debris and cereals
caterpillars in cans of vegetables
fly maggots in fast food
“planted” with intent or to defraud

A

stored products entomology

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17
Q

concerns the use of arthropods in solving crimes most often crimes of violence

impartial biological science

A

medico-criminal entomology

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18
Q

homicide or assault using insects
cases of unexplained deaths (anaphylaxis from bee stings)
causation of traffic evidence

A

medico-criminal entomology

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19
Q

estimation of time of death

post mortem interval

A

medico-criminal entomology

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20
Q

determination of the postmortem interval

the body may have been moved after death

the body may have been disturbed after death

the presence and position of wounds

A

how insect evidence helps crimes

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21
Q

insects can be used to place a suspect at the crime
scene

detection of abuse/neglect of children or elderly
people

detection of the presence of drugs in corpse.

A

how insect evidence helps crimes

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22
Q

civil cases also sometimes use insect evidence

dna determination

gunshot residue from blowfly larvae

A

how insect evidence helps crimes

23
Q

fly species can vary geographically according to

climate, season, and habitat.

A

true

24
Q

phormiaregina prefers

A

shade

25
Q

lucilia illustris prefers

A

sunlit areas

26
Q

insects arrive at a decomposing body in a
particular order (ecological succession) and then
complete their life cycle based on the surrounding
temperature.

A

true

27
Q

by collecting and studying the types
of insects found on a body and their metamorphic
stage, a forensic entomologist can estimate the
time of death or postmortem interval.

A

true

28
Q

application of temperature-dependent development of insects usually flies

A

principal 1 in estimating pmi

29
Q

generally predictable succession of arthropods often facilitates decomposition of organic matter

A

principal 2 in estimating pmi

30
Q 
The accuracy of PMI depends on the
available knowledge base, which in most
cases is dependent on a number of facts
and assumptions concerning insect
biology, behavior and ecology. 
After 24–48H
following death, the most accurate
measure of time since death is
determined by the insect material
developing on the corpse.
A

true

31
Q

attracted to dead bodies and often arrive within minutes of the death of an animal.

they have a complete life cycle that consists of egg, larva, pupa, and adult stages.

A

blow flies

32
Q

adult flies lay eggs on the carcass
especially at wound areas or around the
openings in the body such as the nose, eyes,
ears, anus, etc.

A

first stage of blow fly metamorphosis

33
Q

eggs hatch into larva (maggots) in

12-24 hours.

A

second stage of blow fly metamorphosis

34
Q

larvae continue to grow and molt (shed
their exoskeletons) as they pass through the
various instar stages.

A

third stage of blow fly metamorphosis

35
Q

1st Instar

A

5 mm long after 1.8 days

36
Q

2nd Instar

A

10 mm long after 2.5 days

37
Q

3rd Instar –

A

4-16 mm long after 4-5 days

38
Q 
the larvae (17 mm) develop into pupa
after burrowing in surrounding soil
A

fourth stage of blow fly metamorphosis

39
Q

adult flies emerge from pupa cases after

6-8 days.

A

fifth stage of blow fly metamorphosis

40
Q

tt takes approximately 14-16 days from egg to
adult depending on the temperatures and
humidity levels at the location of the body.

A

true

41
Q

insects are cold blooded

A

true

42
Q

rate of development is more or less dependent on ambient temperature

A

true

43
Q

each species has a threshold temperature below which no development occurs

A

true

44
Q

once the temperature rise above the threshold, a certain amount of time is required for the insects to pass through each life stage

A

true

45
Q

the heat is accumulated as thermal units

it can be calibrated and described as degree days or degree hours

A

true

46
Q

the higher the temperature (within limits), the

faster the growth.

A

true

47
Q

most laboratory rearings have been done at a constant temperature

A

(true)

problems of principal 1 (temperature-dependent development of insects)

48
Q

research is needed to establish correlations between these data, typical diurnal/nocturnal fluctuations and average daily measurement from weather stations.

A

(true)

problems of principal 1 (temperature-dependent development of insects)

49
Q

retrospective weather records from a nearby weather recording station are those most often used in medicocriminal evalutation

A

(true)

problems of principal 1 (temperature-dependent development of insects)

50
Q

studies size and prevalence of maggots and other larva

useful for less than a month old corpse

A

larval development

51
Q

best use for corpse older than a month

A

species succession method

52
Q

once the corpse is too dry, flies and maggots clear out

A

true

53
Q

they work on dry flesh and ligaments

A

hide and carrion beetles

54
Q

they consume remaining hair and only leave skeleton

A

mites and moth larvae

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