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Many terrestrial arthropods exchange gases with their environments by using tracheae, tubes that lead from openings (called spiracles) in the animal's exoskeleton or cuticle directly to the animal's tissues. Some arthropods can control whether their spiracles are open or closed; opening the spiracles allows carbon dioxide produced in the tissues to travel down the tracheae and be released outside the animal. Klok et al. measured the carbon dioxide emitted over time (represented by VCO2) by several species of centipedes. The figure below presents graphs of their results for two species, Cormocephalus morsitans and Scutigerina weberi. (C. J. Klok, R. D. Mercer, and S. L. Chown. 2002. Discontinuous gas-exchange in centipedes and its convergent evolution in tracheated arthropods. Journal of Experimental Biology 205:1019-29.) Copyright 2002 The Company of Biologists and the Journal of Experimental Biology.
-On which body segment are arthropod wings attached?
Entitlement At Work
A belief or expectation by employees that they deserve certain privileges or treatment in the workplace, regardless of their performance or behavior.
360-degree Feedback Method
A performance appraisal technique involving feedback from a circle of stakeholders, including supervisors, peers, subordinates, and sometimes customers.
Displaced Anger
The redirection of anger from its original source to an unrelated target, often due to inability or unwillingness to confront the true source.
Internal Attributions
Internal Attributions refer to the explanation of an individual's behavior based on internal characteristics or traits, such as personality, effort, or ability.
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