Origin and Evolution of Life and Introduction to Classification

Proposed by

Proposed by A.I. Oparin, this theory states that life originated from non-living matter through gradual chemical reactions in the primitive Earth's at

Evolution is supported by multiple lines

Evolution is supported by multiple lines of evidence: fossils (palaeontological), embryonic similarities (embryological), anatomical structures like h

Charles Darwin proposed that organisms

Charles Darwin proposed that organisms with favorable variations survive and reproduce, passing on these traits. This process, called natural selectio

Speciation is the formation of new

Speciation is the formation of new species from existing ones. Reproductive isolation—due to ecological, seasonal, behavioral, mechanical, or physiolo

Classification groups organisms based on similarities

Classification groups organisms based on similarities and evolutionary relationships. The hierarchy includes species, genus, family, order, class, phy