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Use the following information when answering the corresponding questions) .
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 spir opened or closed; opening the spiracles allows the 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. Figure 31.2 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. Figure 31.2
-Look at the graph for Scutigerina weberi note the scale of the y- axis) in Figure 31.2. What is the best interpretation of these results?
Extraction Cost
The expenses associated with the removal of raw materials from their natural setting, including mining, drilling, and quarrying activities.
Interest Rates
The cost of borrowing money or the return on investment for savings, typically expressed as a percentage of the principal.
Conflict Diamonds
Diamonds that are mined and sold by combatants in war zones in Africa as a way to provide the currency needed to finance their military activities.
Extraction Costs
The expenses associated with the removal of natural resources from the earth, such as mining for minerals or drilling for oil.
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