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Classification With your group sort your cards using a classification
you all determine.
Be prepared to share your classification system with the class
TAXONOMY: the science of classifying things Aristotle studied and
classified plants and animals
Carolus Linneaus (1707-1778)- gave rise to our modern classification system
His first work SystemaNaturæ used 3 kingdoms (mineral, vegetable, and animal) and 5 “ranks” (class, order, genus, species, and variety)
Scientific Naming One of Linnaeus’ most important contributions is
Binomial nomenclature- GENUS + SPECIES = scientific name
Genus is capitalized
Species is lowercase
Both are italicized
Scientific names help scientists to communicate.
– Some species have very similar common names.
– Some species have many common names.
Why we classify?
Helps all scientists worldwide know what organism is being talked about
Early on: organisms described by physical characteristics
Two-winged, scaley legged, sharp beaked flyer
“Oak with deeply divided leaves that have no hairs on their undersides and no teeth around their edges
We still use binomial nomenclature and Linneanclassification today
Most inclusive,
least specific
Least inclusive,
most specific
Evolutionary Classification
Biologists now group organisms into categories that represent evolutionary descent, not just physical similarities
CLADOGRAM: a diagram that shows evolutionary relationships in the development of organisms
Derived Characters: “new” characteristics found in recent parts of a lineage.
Cladistics is classification based on common ancestry.
Phylogeny is the evolutionary history for a group of species.
evidence from living species, fossil record, and molecular data
shown with branching tree diagrams
Dichotomous Keys A tool that allows the
user to determine the identity of items in the natural world, such as trees, wildflowers, mammals, reptiles, rocks, and fish. Keys consist of a series of choices that lead the user to the correct name of a given item.
http://oregonstate.edu/trees/dichotomous_key.html
Kingdoms of Life1. Archaebacteria: unicellular prokaryotes
2. Eubacteria: unicellular prokaryotes
3. Protista: unicellular eukaryotes
4. Fungi: multicellular eukaryotic decomposers
5. Plantae: multicellular eukaryotic autotrophs
6. Animalia: multicellular eukaryotic heterotrophs
EubacteriaUnicellular
Prokaryotic
Can be heterotrophic or autotrophic
Diverse Environments Free-living in soil
Disease causing
Protista Domain Eukaryota
Eukaryotic Cells (nucleus and organelles)
Some have Cell Walls Most are unicellular Can be either
autotrophs or heterotrophs
Examples: Amoeba, Paramecia, slime molds,
Three Types:1. Animal-like2. Plant-like3. Fungus-like
Fungi Eukaryotic cells Cell walls of chitin Most are multi-cellular
(yeasts are unicellular) Are heterotrophs (recycle
decomposing material) Reproduce both asexually
and sexually Asexually: mitosis growth of
hyphae, or spores Sexually: make gametes
Fungi are haploid for most of their lives
This life cycle is called “ALTERATION OF GENERATION”
Plantae
Eukaryotic Cells
Cell walls made of cellulose
Chloroplasts contain the pigment chlorophyll
Multicellular
Autotrophs: use photosynthesis
Animalia Eukaryotic Cells
No cell walls
Multicellular
Heterotroph (must eat and use cell respiration to get energy from food)
Most reproduce sexually
HUGE amount of diversity
Groups of Animals Vertebrates
1. Vertebrates (backbone)
- All vertebrates belong to the phylum chordata
- We will discuss five major groups (classes) of vertebrates
Invertebrates
1. Invertebrates (no backbone)
- There are six major groups (phyla) of invertebrates
Sponges: phylum Porifera
Jellyfish, Corals, Sea Anemone(phylum Cnidaria)
Flatworms
PLANARIAN
Annelids
Snails and Slugs: phylum Mollusca
Insects and Shellfish: phylum Arthropoda
This is the largest and most diverse group of animals!
Sea stars and Sea cucumbers: phylum Echinodermata
Fish
Amphibians (class Amphibia)
Reptiles
Birds
Mammals
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order :Primates
Family: Hominidae
Genus: Homo
Species: sapien
Eukaryota
Animalia
Chordata
Fish Bird Amphibian Reptile Mammal
Poriferia Cniardia Nematodes Flatworms Annelids Mollusca arthropoda echinodermata
Plantae Fungi Protista
Bacteria
Eubacteria
Archea
Archea Bacteria