Ascientist raised a species of fruit flies over several generations in separate containers. the diagram shows what happened as a result of the experiment. do you think this is an example of allopatric speciation or sympatric speciation? explain your reasoning.

the fossil record provides evidence of a common ancestor to many species.

the nitrogen cycle provides nitrogen to the ecosystem from the atmosphere, ground and oceans. nitrogen is an important component of complex molecules such as amino acids and nucleotides, which lead to the creation of proteins and dna, the building blocks of all life. plants absorb nitrogen in the form of ammonium, nitrate ion and, on rare occasions, as amino acids. animals receive nitrogen necessary for biological processes from feeding on living or dead organic matter.