Classification - My Teacher Pages

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Classification
Chapter 7 sections 1 & 2
Pages 164-179
Why Classify?
• Classification: putting
things into categories,
orderly groups based on
similar characteristics
• Important Questions:
1. How many known species
are there?
2. What are the defining
characteristics of each
species?
3. What are the relationships
between these species?
How Do Scientists Classify
Organisms?
• Carolus Linnaeus:
founded modern
taxonomy (1700s) based
on shape and structure, 7
level system
• Taxonomy: the science of
describing, classifying,
and naming living things
• The more characteristics
the organisms share, the
more closely related the
organisms may be.
Branching Diagrams
7 Levels of Classification
•
•
•
•
•
•
•
Kingdom-largest
Phyla
Class
Order
Family
Genus
Species
Here are some sentences:
• Kids Prefer Cheese Over Fried Green Spinach.
• Koalas Prefer Chocolate Or Fruit, Generally
Speaking
• King Philip Came Over For Good Spaghetti
• Keeping Precious Creatures Organized For
Grumpy Scientists
Scientific Names
• Two Part Names: Genus
and Species
• All two part names: the
genus starts with a
capital letter and the
species names start
with a lower case letter,
usually italicized when
surrounding words are
not
• Usually in Latin or Greek
Dichotomous Keys
• An identification aid
that uses sequential
pairs of descriptive
statements
• Consists of answers to a
series of questions
Taxonomic Key
What steps would you use to identify an apple?
 1a Fruits occur singly ................................................. Go to 3
 1b Fruits occur in clusters of two or more ................ Go to 2
 2a Fruits are round ................................................... Grapes
 2b Fruits are elongate ............................................... Bananas
 3a Thick skin that separates easily from flesh .........Oranges
 3b Thin skin that adheres to flesh .............................. Go to 4
 4a More than one seed per fruit ............................ Apples
 4b One seed per fruit ............................................ Go to 5
 5a Skin covered with fuzz.................... Peaches
 5b Skin smooth, without fuzz........................... Plums
The Six Kingdoms
Two Kingdoms of Bacteria
• Archaebacteria: prokaryotes that can live in extreme
conditions
• Eubacteria: all bacteria not in the archaebacteria kingdom
such as bacteria found in soil, water, and inside you.
Kingdom Protista
• Simple multicellular or
single celled
• Eukaryotes
• Not plants, animals or
fungi
• Animal like protists
called protozoa
• Plant like protists called
algae (slime mold)
Kingdom Fungi
• Molds and mushrooms
• Do not perform
photosynthesis (like
plants) and do not eat
food (like animals)
• They absorb nutrients
• Use digestive juices to
break down substances
Kingdom Plantae
•
•
•
•
•
Eukaryotic
Cell Walls
Photosynthesis
Can be on land or water
Provide habitat for
other organisms also
provide food for
organisms
• Can not move around
Kingdom Animalia
• Complex, multicellular
organisms that don’t have
cell walls
• Usually able to move
around
• Specialized sense organs
• Quickly respond to their
environment
• Also includes worms,
insects, coral and even
sponges
The modern system of classification
has 8 levels:
• Domain
• Kingdom
• Phylum
• Class
• Order
• Family
• Genus
• Species
Extras…
• Brain Pops: Classification, Six Kingdoms,
Bacteria, Fungi, Protozoa, and Protists
• http://sciencespot.net/Pages/kdzbioclass.html
• http://www.biology4kids.com/index.html
• http://www.biology4kids.com/files/studies_ta
xonomy.html
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