What is spontaneous generation? [Check all that apply]
(A) the self-assembly of macromolecules from monomers
(B) the belief that life can just create itself under the right conditions
(C) the theory cells will over time form into multicellular organisms
(D) an old theory of life creation on early earth
(B) and (D) are correct. Spontaneous generation was an old theory of how life began on earth. It assumed the creation of life from nonliving things, under the appropriate conditions. This theory has since been debunked.