Which human action has not lead to significant changes in earths biome

What are the two main phases of a cell cycle

In which of the following relationships is one organism always benefited while the other organism is always harmed

Gregor mendel is best known for his work with pea plants and for uncover many of the mysteries of genetics. one of his major findings stated that there were specific, physical units of inheritance that are transmitted during reproduction. what is the the name given to these units of inheritance which can be found on chromosomes? a) centromeres b) cytoplasm c) genes d) nucleotides