NATS 1675 Lecture : Evolution (Chapter 22) Lecture Overheads (revised).docx
30 Mar 2014
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Evolution comes from the latin word evolvo = unroll. Evolution in the broadest sense is the unfolding of a changing continuity , it is change over time. Organic evolution the evolution of living organisms i. e. , inheritable change in lines of successive generations. Evolution is also the concept that there is a kinship among all forms of life because all evolved over time from one common ancestor. Time the age of the earth is a bit over 4. 6 billion years. If the history is the earth is compressed into a single year starting 1 january: 31 december (9:07 pm) ancestral humans of the genus homo; (11:45 pm) homo sapiens (our species) appeared. Genetics comes from the greek gen = to be born, to become something. Genetics includes the transmission of traits from generation to generation by birth, and it also includes how traits are expressed (our characteristics).
