What is the one main difference in how unicellular organisms and multicellular organisms maintain homeostasis.
only unicellular organisms have specialized cells that work to maintain homeostasis
only multicellular organisms have specialized cells that work to maintain homeostasis
only unicellular organisms have to balance factors such as water and temperature
only multicellular organisms have to balance factors such as water and temperature

step 1: nitrogen fixation- conversion of atmospheric no₂ into forms useful to plants by lightning, bacteria, and cyanobacteria.

step 2: nitrification-process of converting ammonia to nitrite or nitrate.

step 3: assimilation-plant roots absorb new form of nitrogen.

step 4: ammonification-conversion of organic nitrogen to ammonia by bacteria involved in decomposition.

step 5: denitrification-bacteria turns the decomposed matter back into n₂o, which is released into atmosphere; repeat cycle.

they have identical fossils of organisms that have evolved over time.

both have animal fossils preserved in them due to weathering and erosion.

they contain different fossils because life on earth has changed through time.

the fossils in them were formed on the surface of earth due to exposure to sunlight.