Demodex: Demodex folliculorum and Demodex brevis are microscopic arachnids (mites) that inhabit human hair follicles and sebaceous glands. In forensic science, postmortem examination of facial follicles and tissues reveals Demodex densities and degradation status, assisting in postmortem interval (PMI) estimation.
Other Genera: Tetranychus and Eriophyes are exclusively phytophagous plant pests; Otobius is the spinose ear tick of livestock.
Conclusion: Demodex is associated with forensic science on human corpses (Option 3).
Correct option: (3) Demodex
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2
ICAR JRF Entomology 29 Jun 2024Shift 1
MCQ (Single Correct)+4−1
Cantharidin is a yellow coloured acidic secretion of
Cantharidin: A defensive, blistering bicyclic terpenoid compound found in the haemolymph and reproductive organs of blister beetles (family Meloidae, Coleoptera; e.g., Mylabris pustulata, Epicauta spp.).
Properties: Synthesized by male blister beetles and transferred as a nuptial gift to females during mating. When threatened, the beetles undergo reflex bleeding, discharging yellowish haemolymph containing cantharidin that causes severe chemical blisters on mammalian skin.
Correct Option: Option 4 (Blister beetles).
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