Ch. 13 Forensics
Terms in this set (26)
animals visible to the naked eye, generally 1 mm and longer.
"divided into two parts"; therefore, its keys always give two choices in each step in identifying an organism.
the classification ont things in an orderly way that indicates natural relationships.
animals characterized by jointed legs, a segmented body, and a hard, nonliving exo-(outer) skeleton. the exoskeleton does not keep up with the growth of the insect, and so must be shed periodically. this process is called molting. the stages between molts are termed instars.
the carcass of a dead and decaying animal.
the scientifice study of insects.
feeding on carrion; the Greek word phagos, to eat, and necro, meaning dead.
Postmortem Interval (PMI)
the time elapsed since a person has died.
the cooling of body temperature after death.
a formula used for determining the approximate time period since death based on body temperature.
a purple of red discoloration of the skin caused by pooling of blood after death.
a stiffness in the muscles that occurs shortly after death.
a process by which a biological cell self-destructs.
the decomposition of animal proteins, especially by anaerobic microorganisms.
also called "grave wax", insoluble fatty acids left as residue from preexisting fats from decomposing cadavers. it is formed by the slow hydrolysis of fats in wet ground and can occur in both embalmed and untreated bodies.
the alkaline hydrolysis of fatty acid esters. in chemistry, it refers to the reaction of a base with a fat to form soap.
the process of chemical and physical change in deposited sediment during its conversion to rock.
biological process in development of animals, usually involving conspicuous changes in the animal's form or structure. about 88 percent of all insects go through this complete process in four major stages.
the shredding of an insect's outer skeleton during a growth stage.
a developmental stage of arthropods, generally referring to changes in the size of the larve.
the depositing or laying of eggs. to oviposit means to lay eggs.
concerning the surrounding area or environment.
tiny eight-legged creature belonging to the order Acarina, related to spiders and ticks. some live freely, other as parasites.
emergence of an adult fly from its pupal case.
a unit of measure of the energy absorbed by a biological system, causing growth.
cases formed by the hardening of the last larval skin in which the pupa is formed. color starts out white and turns brown with time.
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