What is free nitrogen?
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nitrogen that is ready for plants to use
nitrogen that has been fixed by bacteria
nitrogen that cannot be used by organisms
nitrogen that is returned to the soil by decomposers

What goes in and out of a cell respiration?

Stem cells found adult tissue such as in bone marrow brain muscle skin and liver are only capable of what

Describe the change in phase and temperature as water moves from the oceans to the atmosphere and then returns to earth again as rain. a) evaporation : temperature increases; condensation : temperature decreases; precipitation (rain) : temperature decreases b) evaporation : temperature increases; condensation : temperature decreases; precipitation (rain) : temperature increases c) evaporation : temperature decreases; condensation : temperature decreases; precipitation (rain) : temperature decreases d) evaporation : temperature increases; condensation : temperature increases; precipitation (rain) : temperature decreases