chapter 2 classification life over time. what is classification? all living things are classified...
TRANSCRIPT
![Page 1: Chapter 2 Classification Life Over Time. What is Classification? All Living Things are classified –Classification means to arrange organisms into groups](https://reader033.vdocuments.mx/reader033/viewer/2022051516/56649e525503460f94b47bef/html5/thumbnails/1.jpg)
Chapter 2Classification
Life Over Time
![Page 2: Chapter 2 Classification Life Over Time. What is Classification? All Living Things are classified –Classification means to arrange organisms into groups](https://reader033.vdocuments.mx/reader033/viewer/2022051516/56649e525503460f94b47bef/html5/thumbnails/2.jpg)
What is Classification? All Living Things are classified
– Classification means to arrange organisms into groups based on similarities or traits.
What are some examples of classification that we see everyday?
![Page 3: Chapter 2 Classification Life Over Time. What is Classification? All Living Things are classified –Classification means to arrange organisms into groups](https://reader033.vdocuments.mx/reader033/viewer/2022051516/56649e525503460f94b47bef/html5/thumbnails/3.jpg)
Early History of Classification
Aristotle- a Greek philosopher who observed living things.– Lived over 2000 years ago
Classified organisms as either plants or animals
![Page 4: Chapter 2 Classification Life Over Time. What is Classification? All Living Things are classified –Classification means to arrange organisms into groups](https://reader033.vdocuments.mx/reader033/viewer/2022051516/56649e525503460f94b47bef/html5/thumbnails/4.jpg)
Vocabulary Taxonomy- “taxis”= arrangement
– The science of naming and classifying organisms.
– Taxonomists use classification to organize living things on their similarities and differences.
![Page 5: Chapter 2 Classification Life Over Time. What is Classification? All Living Things are classified –Classification means to arrange organisms into groups](https://reader033.vdocuments.mx/reader033/viewer/2022051516/56649e525503460f94b47bef/html5/thumbnails/5.jpg)
Scientists collect physical and genetic evidence to classify species.
![Page 6: Chapter 2 Classification Life Over Time. What is Classification? All Living Things are classified –Classification means to arrange organisms into groups](https://reader033.vdocuments.mx/reader033/viewer/2022051516/56649e525503460f94b47bef/html5/thumbnails/6.jpg)
Kingdom- largest classification group –Aristotle created two Kingdoms:
Plants and Animals
–Today there are 6 Kingdoms
![Page 7: Chapter 2 Classification Life Over Time. What is Classification? All Living Things are classified –Classification means to arrange organisms into groups](https://reader033.vdocuments.mx/reader033/viewer/2022051516/56649e525503460f94b47bef/html5/thumbnails/7.jpg)
Classifying Species Years ago, scientist would classify
species according to behavior & appearances.
Scientist needed a system for organizing and naming organisms…
![Page 8: Chapter 2 Classification Life Over Time. What is Classification? All Living Things are classified –Classification means to arrange organisms into groups](https://reader033.vdocuments.mx/reader033/viewer/2022051516/56649e525503460f94b47bef/html5/thumbnails/8.jpg)
New system Carolus Linnaeus- Swedish physician
and naturalist who discovered and named ~4000 species.– Used appearance to classify species into
groups
– Created “two name” naming system that specifically identified ALL living things
![Page 9: Chapter 2 Classification Life Over Time. What is Classification? All Living Things are classified –Classification means to arrange organisms into groups](https://reader033.vdocuments.mx/reader033/viewer/2022051516/56649e525503460f94b47bef/html5/thumbnails/9.jpg)
Scientific Naming System Binomial Nomenclature- means
“Two Names” or Scientific Name
![Page 10: Chapter 2 Classification Life Over Time. What is Classification? All Living Things are classified –Classification means to arrange organisms into groups](https://reader033.vdocuments.mx/reader033/viewer/2022051516/56649e525503460f94b47bef/html5/thumbnails/10.jpg)
GENUS
First Name: Genus- a group of closely related
species–Example: Puma, Marbled Cats,
House Cat are classified in the… Genus: Felis
![Page 11: Chapter 2 Classification Life Over Time. What is Classification? All Living Things are classified –Classification means to arrange organisms into groups](https://reader033.vdocuments.mx/reader033/viewer/2022051516/56649e525503460f94b47bef/html5/thumbnails/11.jpg)
SPECIESSecond Name: Species- group of similar organisms that
reproduce among themselves.– Puma: Felis concolor – Marbled Cat: Felis marmorata– House cat: Felis domesticus
– Humans: Homo sapiens
![Page 12: Chapter 2 Classification Life Over Time. What is Classification? All Living Things are classified –Classification means to arrange organisms into groups](https://reader033.vdocuments.mx/reader033/viewer/2022051516/56649e525503460f94b47bef/html5/thumbnails/12.jpg)
FACT Over 1.5 million species have
been named and described.
However, it is estimated that as many as tens of millions of species have yet to be discovered…
![Page 13: Chapter 2 Classification Life Over Time. What is Classification? All Living Things are classified –Classification means to arrange organisms into groups](https://reader033.vdocuments.mx/reader033/viewer/2022051516/56649e525503460f94b47bef/html5/thumbnails/13.jpg)
Seven Levels of Classification
1. Kingdom-largest
2. Phylum
3. Class
4. Order
5. Family
6. Genus
7. Species-smallest
King Phillip Came Over For Good Spaghetti
![Page 14: Chapter 2 Classification Life Over Time. What is Classification? All Living Things are classified –Classification means to arrange organisms into groups](https://reader033.vdocuments.mx/reader033/viewer/2022051516/56649e525503460f94b47bef/html5/thumbnails/14.jpg)
Dichotomous Key- a tool used to help classify organisms based on their characteristics
![Page 15: Chapter 2 Classification Life Over Time. What is Classification? All Living Things are classified –Classification means to arrange organisms into groups](https://reader033.vdocuments.mx/reader033/viewer/2022051516/56649e525503460f94b47bef/html5/thumbnails/15.jpg)
Modern Classification Phylogeny- an
organism’s Evolutionary History – “Family
History” or “Family Tree”
![Page 16: Chapter 2 Classification Life Over Time. What is Classification? All Living Things are classified –Classification means to arrange organisms into groups](https://reader033.vdocuments.mx/reader033/viewer/2022051516/56649e525503460f94b47bef/html5/thumbnails/16.jpg)
Six Kingdom Names:1. Kingdom Eubacteria
- Strep throat
2. Kingdom Archaebacteria- Blue Green Algae
3. Kingdom Protista- One celled animals
4. Kingdom Fungi5. Kingdom Plant6. Kingdom Animal
![Page 17: Chapter 2 Classification Life Over Time. What is Classification? All Living Things are classified –Classification means to arrange organisms into groups](https://reader033.vdocuments.mx/reader033/viewer/2022051516/56649e525503460f94b47bef/html5/thumbnails/17.jpg)
Question? What are some reasons why scientists
classify things?
– Avoid Mistakes identifying species– Organisms with similar evolutionary
histories are classed together– Give descriptive info. about the species– Helps organize info. quickly and efficiently