Presentation on theme: "“Why do scientists classify?”. Imagine that you live in a tropical rain forest and are responsible for getting your own food, shelter, and clothing from."— Presentation transcript:
“Why do scientists classify?”
Imagine that you live in a tropical rain forest and are responsible for getting your own food, shelter, and clothing from the forest. What do you need to know to survive?
1)If you are going to survive, you will need to know which plants you can eat and which are poisonous. 2) You will need to know which animals to eat and which may eat you. You will need to organize the living things around you into categories, or classify them.
Think about an elephant. Develop a mental image of it. How would you describe it to someone who has never seen one? Take a moment to consider carefully...
Classification Is the arrangement of organisms into groups based on their similarities.
Classification History Greek Began with Aristotle in 384-322 B.C Animals separated in groups by blood, way of life, and body shape.
Classification History English John Ray created, in 1600’s, the basic unit of classification using diff. species.
Carolus Linnaeus Swedish Doctor and botanist Created taxonomy/classification 1753
“Why Classify?” Classifying living things makes it easier for biologists to find the answers. To see how organism are related. How is a cat like a tiger?
Taxonomy Is the science of identifying, classifying, and naming living things. Based on a common ancestor. Ex. Platypus, bear, lion, cat = Mammalia
Branching Diagrams Show the characteristics that link animals to a common ancestor.
Levels of Classification King Phillip came over for grape soda. Kingdom Phylum Class Order Family Genus Species
Classification level Name Characterized by: DomainEukarya Nucleus, organelles KingdomAnimalia Ingests food, multicellular, no cell wall PhylumArthropoda Hard exoskeleton, paired legs, segmented body ClassInsecta Terrestrial, six legs, antennae OrderDipteraTwo-winged FamilyDrosophilidae GenusDrosophila SpeciesD. melanogasterCommon fruit fly
Scientific Names In Latin/Greek -Universal naming (so everyone understands) Have 2 parts Ex. Indian Elephant = Elephas maximus genusspecies Indian Elephant = Elephas maximus
Tyrannosaurus rex Genus “tyrant lizard Species “king”
Dichotomous Key Helps identify unknown organisms using pairs of statements or questions. Pg. 207