bisci worksheet 1 - Topic I Organization of life Atom...

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Topic I Organization of life: Atom- smallest part of an element that retains its properties Molecules-two or more atoms linked together Cell-basic unit of life Tissue-group of cells performing a function (4 different types) Organ- group of tissues performing a function Organ system-group of organs performing a function Organism-a group of organ systems performing a function Population-all the organism Community-all the populations of an area Ecosystem-all the communities Biome Biosphere-earth Autotrophic-photosynthesis producer (.1 of 1% of the sun’s energy) Heterotrophic-all animals including fungi and many bacteria; they are unable to synthesize organic, carbon based compounds Cell types- a. prokaryotic-lack a membrane bound nucleus b. eukaryotic-membrane bound organelles DNA makeup- deoxyribonucleic acid; molecule of heredity; language of life; composed of nucleotide, pentose sugar, deoxyribos, phosphate, nitrogenous base; A-adenine, T-thymine, C-cytosine, G-guanine Domains: 1. Archae- live in hot springs, too acidic, too salty, too hot, no oxygen 2. Bacteria- benefit, harmful, useless 3. Eukarya- eukaryotic cell
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