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Introduction to Classification
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Why do we classify things?
To organize To see relationships between organisms
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How do we classify things?
By grouping things according to similar traits or characteristics
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How do we classify organisms?
Taxonomy – science of classification We classify organisms into 5 Kingdoms Monera, Protists, Fungi, Animal, Plant
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What are the levels of classification?
Kingdom - Largest group – fewest traits in common Phylum Class Order Family Genus Species - Smallest group – all traits in common
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How can we remember this?
Kingsize Potato Chips Often Form Grease Stains King Philip Came Over From Germany Swimming
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What is a scientific name?
Name used to identify an organism Binomial – 2 names Example: Common Name Genus Species Human Homo Sapien Dog Canis Familiaris
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What is Binomial Nomenclature?
Two Name – Naming System Genus and Species Names First letter of each name: Genus – Capitalize Species – lower case
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What are the Five Kingdoms?
Monera Protists Fungi Animal Plant
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Summary Why do scientists classify things?
How are organisms classified? What is a scientific name? What is binomial nomenclature? What are the 7 levels of classification? What are the 5 Kingdoms? What is the science of classification?
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Kingdom Monera
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What is a Monera? A single-celled organism which lacks a Nucleus!
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What are some Monerans? Some Examples of monerans are: Bacteria
Blue-green bacteria
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How are Monera Named? Monera are named based on their shape. There are three shapes Round – “cocci” Rod shaped – “bacilli” Spiral – “spirilli”
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How are Monerans helpful?
Monerans are helpful in many ways: Decomposers in the environment. Feed on dead organisms and wastes. Produce foods like yogurt. Help in digestion.
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How are Monerans Harmful?
Some monerans can be harmful by: Causing disease. Make foods spoil.
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Protist Kingdom
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What is a Protist? A protist is a Single-celled organism which has a nucleus! There are 2 groups: Algae and Protozoa.
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What are Algae? Algae are Plant-like protists
They can photosynthesize. Some examples of Algae are: Diatoms and Spyrogyra.
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What are Protozoa? Animal-like protists.
Protozoa can move and must injest food to survive. Some examples of Protozoa are: Amoeba Paramecium and Euglena.
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How do Protists move? Protists move using a few different techniques:
Pseudopods – False feet. Flagella – Long hair, whiplike. Cilia – Small hairs Some have No movement and use air and water to get around.
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Amoeba
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Euglena
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Paramecium
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Protists can perform all life processes.
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How do Protists Reproduce?
Protists reproduce through Mitosis (fission).
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How do Protists get energy?
Protists get their energy by doing respiration in their Mitochondria.
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How do Protists get nutrients?
Protists get food and water through transport (passive/active) across the cell membrane.
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How do Protists excrete wastes?
Wastes are released through the cell membrane.
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Fungi Kingdom
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What are Fungi? Single-celled (Yeast) or
Multi-celled (mushrooms, mold) organisms. Have Nucleus and cell walls. NO Chloroplasts!
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What are some examples of Fungi?
Yeast Mold Mushrooms
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How do Fungi Eat? Fungi release digestive enzymes into their food source through hyphae (hair-like “root” structures) and digested material is then absorbed.
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How do Fungi Reproduce? Yeast – do budding (Mitosis)
Mushroom and Mold – Produce spores
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Plant Kingdom
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What are Plants? Multi-cellular organisms.
Can Photosynthesize (make their own food). Have cell walls. Can Not move.
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Plants Contain many specialized tissues/organs.
What are the Parts? Roots – Anchor the plant, absorb water, store food. Leaves – Produce food through Photosynthesis. Stems – support plant. Bark – protects stem cells. Vascular tissue – transports food and water.
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How do Plants Reproduce?
Asexually - through vegetative propagation (root and Leaf cuttings). Sexually – with cones and flowers.
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Animal Kingdom
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What is an animal? Multi-cellular organism. Can move.
Can Not make own food.
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How are animals Classified?
Animals are classified into two main groups. Invertebrates and Vertebrates.
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Two Main groups of Animals.
Invertebrates – Lacks an internal skeleton (No Backbone). Vertebrates – Have an internal skeleton (Have Backbone). Vertebrates can be either warm or cold-blooded.
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Vertebrate Catagories
Cold-blooded – Use environment to get body heat. Ex: Snails, bees, jellyfish, worms. Warm-blooded – Can produce own body heat and maintain constant body temperature. Ex: Birds, Mammals (Humans).
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Non-cellular Kingdom
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What is a Virus? A Virus is a non-living particle which contains material for reproduction (DNA).
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Is it Alive? NO, because they do not perform all of the life functions.
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What do Viruses do? Viruses reproduce themselves with the help of a host cell. The virus duplicates inside the host cell. The host cell then bursts and dies.
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How do Viruses cause disease?
Disease comes from the infected and dead cells. Viruses are considered Parasites because they damage host cells.
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Virus Reproducing
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How do Viruses look?
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