What role do bacteria play in the nitrogen cycle?

a. they fix nitrogen into forms usable by plants
b. they release fixed nitrogen into the atmosphere
c. they move nitrogen through the vascular system
d. they make nitrogen available for humans

Hybridization occurs frequently in naturethe act or process of mating organisms of different varieties or species to create a hybrid. (molecular biology) the process of forming a double stranded nucleic acid from joining two complementary strands of dna