0.249 g of a common diatomic gas occupies a volume of 250. ml at 120°c and 760 mmhg. using a periodic table, what is the identity of this element?

A tick living on a dog and drinking it's blood = Parasitism

Birds that live among cattle too eat insects stirred up by grazing =  Mutualism

A clownfish living on the tentacles of an anemone provides nutrients too the anemone, and the clownfish is protected from predators = commensalism

A bear catching and eating a salmon from the river = predation

A bobcat catching and eating a rabbit = predation

A tapeworm living on the digestion system of a horse = parasitism

A Egyptian plover eating bugs off a giraffe or rhino  = Mutualism

Bees gathering nectar and then spreading pollen too a flower = commensalism

Explanation:

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