ENVR 202 Lecture Notes - Lecture 9: Cell Nucleus, Phototroph, Autotroph
29 Nov 2017
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Document Summary
Evolution by natural selection: change in allele frequences in a population over time, driven by variation in reproductive successes ( tness) Genetic coding for a trait = allele: can be protein, traits (phenotypes, allele is any variant of that gene. Types of life: 3 domains: prokarytoes: divided into two domains: bacteria and archaea (comprise prokaryotes, all remaining organisms are eukaryotes. 3 essential attributes of all living organisms: life is a bounded organized structure with a consistent, non-random composition, requiring steady inputs of energy, able to store and transmit information within and across generations. Two fundamentally different types of cells: prokaryotes and eukaryotes: prokaryotes: single-cell organisms, eukaryote: genetic materials concentrated in cell nuclei, contained in a single strand of dna. Chemotroph habitats: constant in ux of chemical compounds, absence of light extremophiles. Information storage in prokaryotes: dna and rna: genetic information just stored in cytoplasm of cell.
