In 1859, charles darwin described a model of how living things change over time. he described this model and the evidence that supported it in a book called on the origin of species. which scientific term is used to describe a testable model that seeks to explain natural phenomena? a) data b) hypothesis c) observation d) theory

The answer is theory which is a proposed explanation whose status is still conjectural and subject to experimentation, in contrast to well-established propositions that are regarded as reporting matters of actual fact.

d bonding propertys

explanation:

carbon can form so many different compounds not just with oxygen

during the process of dna replication, brdu can replace thymidine and incorporate into the newly synthesized dna, cell proliferation thus can be reflected in the extent of brdu incorporation.