BIOA01H3 Chapter Notes - Chapter 1: Louis Pasteur, Cell Membrane, Human Body
18 Oct 2016
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BIOA01H3 Full Course Notes
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Life- chemical system capable of undergoing darwinian evolution. Four key characteristics of living organisms: complexity- precise spatial organization on several scales, the ability to change in response to the environment, the ability to reproduce, the capacity to evolve. Both living and non-living systems share the same attribute which is: both are subject to the basic laws of chemistry and physics. All elements that make up living things can be found in non-living systems. Relative abundances of elements in organism differ greatly from those in the non-living world. Hydroge(cid:374) a(cid:374)d heliu(cid:373) (cid:373)ake up for a(cid:271)out 99% of k(cid:374)o(cid:449)(cid:374) (cid:373)atter a(cid:374)d the earth"s (cid:272)rust (cid:272)o(cid:374)tai(cid:374)s mostly oxygen and silicon w/ aluminum, iron and calcium. Human body is made up of mostly oxygen, carbon, and hydrogen. States that energy can neither be created nor destroyed-can only be transformed from one form to another. Total energy in the universe is constant. All organisms obtain energy from the sun or from chemical compounds.
