Environmental Science
Lead poisoning

reduces O2 carrying capacity of myoglobin in muscles
increases O2 carrying capacity of myoglobin in muscles
reduces O2 carrying capacity of hemoglobin in blood
increases O2 carrying capacity of hemoglobin in blood

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Environmental Science
Which one is true?

commensalism when none of the interacting populations affect each other
commensalism when the interaction is useful to both the populations
symbiosis when the interaction is useful to both the populations
symbiosis when neither population affects each other

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