Ecosystems can be changed by natural events or by human actions. which is not a natural event? a. a forest fire started by lightning b. pollution from a factory entering a river c. a beaver building a dam in a river d. an earthquake

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