2 Characteristics of Living Things Made of Cellsunicellular vs.. multicellularRed Blood cellsOnion skin epidermal cellsHuman cheek cells
3 Characteristics of Living Things 2. Grows and developsIncrease in cell size and/or numberIncludes: development, aging, deathDifferentiation – cell specialization for a certain job
4 Characteristics of Living Things 3. Obtains & uses EnergyMetabolism (sum of all chemical reactions)Anabolism- simple to complex(build –up rxns.)Catabolism – complex to simple(break-down rxns.)Heterotrophic (other feeding)vs. autotrophic (self-feeding)
5 Characteristics of Living Things 4. Reproducestwo kinds of reproduction:- asexual – takes oneto make more- sexual – takes two
6 Characteristics of Living Things 5. Responds to the Environmenta. Movement – internal or externalb. Irritability - ability to respond toa stimulusExamples of stimuli : sight, sound, touch, pressure, temperature, chemicals, color, light, other?c. Adaptability
7 TaxonomyA. Definition = science of naming things & assigning them to groups
8 Taxonomy B. Why have a classification system? 1. Single, universal name2. Avoid confusion3. Understand how living things arerelated to one another
9 TaxonomyWhat are the FIVE common names of this animal?
11 Taxonomy¿Wouldn’t it be confusing if we didn’t have a scientific name?Felis concolor = scientific name of themountain lionGenus species
12 C. Examples of classification systems: TaxonomyC. Examples of classification systems:1. Dewey decimal system – library2. Sections of store – music store3. Periodic Table of elements Chemistry4. Others?
13 Taxonomy D. Binomial nomenclature System of scientific naming Developed by Carolus Linnaeus(Swedish botanist) in 1750sTwo part scientific name Genus and speciesMust be underlined or in italicsIn Latin (dead language of scholars)
14 Taxonomy E. Example : Homo sapiens (wise man) 1. Scientific name for human beings2. Homo = genus(capitalized & underlined)3. sapiens = species(underlined, but NOTcapitalized)
15 Taxonomy F. Definition of species = 1. breed successfully viable, fertile offspring2. unique features similar to others ofsame species3. have similar DNA to other speciesmembers
16 Taxonomy G. 7 Taxa of living things ( taxon = group) Kingdom (kings) Phylum (play)Class (chess)Order (on)Family (fine)Genus (green)Species (silk)
17 Taxonomy H. Kingdom is least specific, largest group I. Species is most specific,contains only one kind of organism
18 Taxonomy J. An example: Kingdom Animalia Phylum Chordata Class MammaliaOrder PrimatesFamily HominidaeGenus HomoSpecies sapiens