BIOL 1F90 Lecture Notes - Lecture 2: Homeostasis, Atomic Nucleus, Chemical Element
13 Sep 2016
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Document Summary
Living organisms can be made of one or many cells c. i. Diatoms are unicellular and live in ponds, lakes and harness light for. In order for molecular processes such as metabolism to occur we need energy a: humans are incapable of producing our own energy unlike plants using photosynthesis. Living organisms interact with their environment: predator/prey relationship, adaptions to environment. Living organisms have mechanisms that maintain homeostasis: organisms have internal functions to regulate themselves. Living organisms can be viewed and studied at different levels of organization: from atoms. The smallest component of life: to the biosphere. All places on earth where living organisms exist. Smallest functional units of matter that form all chemical substances. Cannot be further broken down into other substances by ordinary chemical or physical means. Each specific type of atom is a chemical element: e. g hydrogen (1 angstrom), nitrogen, oxygen.
