NATS 1675 Lecture 4: TOPIC 1- Lecture 4 Notes

• School: York University
• Department: Natural Science
• Course: NATS 1675
• Professor: Robert Crippen

Document Summary

Evolution comes from the latin word evolvo = unroll. Evolution in the broadest sense is the (cid:862)u(cid:374)foldi(cid:374)g of a (cid:272)ha(cid:374)gi(cid:374)g (cid:272)o(cid:374)ti(cid:374)uit(cid:455)(cid:863), it is (cid:272)ha(cid:374)ge o(cid:448)er ti(cid:373)e. 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; and 2 hours, 38 minutes later at (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 i(cid:374)(cid:272)ludes ho(cid:449) traits are e(cid:454)pressed (cid:894)our (cid:862)(cid:448)isi(cid:271)le(cid:863) a(cid:374)d i(cid:374)(cid:448)isi(cid:271)le (cid:272)hara(cid:272)teristi(cid:272)s(cid:895).