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Transcript
Characteristics of Living Things Organism = any living thing -bacteria -hippopotamus -you!!! CREDGREW (Mnemonic Device) CREDGREW C = Cells!!! All living things are made up of cells. CREDGREW C = Cells!!! All living things are made up of cells. • Unicellular = single celled organism Unicellular organism = single celled CREDGREW C = Cells!!! All living things are made up of cells. • Unicellular = single celled organism • Multicellular = organism with many cells CREDGREW C = Cells!!! All living things are made up of cells. • Unicellular = single celled organism • Multicellular = organism with many cells • Prokaryotic = type of cell; very simple; evolved early; no nucleus Prokaryotic cell = simple cell; no nucleus; evolved first Example = Bacterial cell CREDGREW C = Cells!!! All living things are made up of cells. • Unicellular = single celled organism • Multicellular = organism with many cells • Prokaryotic = type of cell; very simple; evolved early; no nucleus • Eukaryotic = type of cell; complex; evolved later; contains nucleus and other organelles Eukaryotic cell = more complex; evolved later; contains a nucleus (and many other organelles) Example = corn cell CREDGREW R = Reproduction; All organisms reproduce • Asexual reproduction - one parent • Sexual reproduction - two parents CREDGREW E = Energy; All organisms use energy from “food”; this is usually in the form of glucose (a sugar) • Autotroph = an organism that makes it’s own food using the sun; also known as a “producer”; examples are plants and algae • Heterotroph = get food from other organisms; also known as a “consumer” CREDGREW D = DNA (Deoxyribonucleic acid); all cells contain DNA; DNA is the chemical that genes are made of Double helix CREDGREW D = DNA; all cells contain DNA; DNA is the chemical that genes are made of G = Grow; all organisms grow CREDGREW D = DNA; all cells contain DNA; DNA is the chemical that genes are made of G = Grow; all organisms grow R = Response; all organisms respond to stimuli (anything in an organism’s environment that causes it to react) CREDGREW D = DNA; all cells contain DNA; DNA is the chemical that genes are made of G = Grow; all organisms grow R = Response; all organisms respond to stimuli E = Exchange; all organisms exchange gasses; take in CO2 and let out O2 CREDGREW E = Exchange; all organisms exchange gasses; take in CO2 and let out O2 W = Waste; all organisms produce waste • Examples: CO2, ammonia, undigested food