CLASSIFYING ORGANISMS

LS CH 7 SEC 4

GOAL/PURPOSE STUDENTS WILL BE ABLE TO EXPLAIN

WHY BIOLOGISTS CLASSIFY ANIMALS. RELATE THE LEVELS OF

CLASSIFICATION BETWEEN ORGANISMS

LIST CHARACTERISTICS USED TO CLASSIFY ORGANISMS INTO GROUPS.

WHY CLASSIFY? KEY- SCIENTIST HAVE IDENTIFIED

MORE THAN 1.5 MILLION SPECIES KEY- SCIENTIST GROUP ORGANISMS

BASED ON SIMILARITIES IN THEIR FEATURES, BEHAVIOR, AND DNA.

CLASSIFICATION- IS THE PROCESS OF GROUPING THINGS BASED ON THEIR SIMILARITIES

CONT’D KEY- BIOLOGIST USE CLASSIFICATION

TO ORGANIZE LIVING THINGS INTO GROUPS SO THAT THE ORGANISMS ARE EASIER TO STUDY.

TAXONOMY- IS THE SCIENTIFIC STUDY OF HOW LIVING THINGS ARE CLASSIFIED

NAMING SYSTEM KEY- TAXONOMY INVOLVES NAMING

OF THE ORGANISM. BINOMIAL NOMENCLATURE- THE

NAMING SYSTEM USED THAT GIVES EACH ORGANISM A 2-PART NAME.

EX- FELIS CONCOLOR- MOUNTAIN LION OR FELIS DOMESTICUS- HOUSE CAT

CONT,D KEY -THE FIRST WORD IN THE SYSTEM IS CALLED

THE GENUS. GENUS- IS A CLASSIFICATION GROUPING THAT

CONTAINS SIMILAR, CLOSELY RELATED ORGANISMS.

EX- ALL CATS BEGIN WITH ‘FELIS’ ‘felidae’plural KEY- THE SECOND WORD IN THE NAME OFTEN

DESCRIBES A DISTINCTIVE FEATURE OF AN ORGANISM, SUCH AS WHERE IT LIVES OR ITS APPEARANCE.

BrainPOP http://www.brainpop.com/science/diversityo

flife/classification/

LEVELS OF CLASSIFICATION KEY- MOST BIOLOGISTS TODAY

CLASSIFY ORGANISMS INTO EIGHT LEVELS

KEY- THE MORE LEVELS THAT 2 ORGANISMS SHARE, THE MORE CHARACTERISTICS THEY HAVE IN COMMON.

THREE DOMAINS (BIG CATEGORIES)

1. BACTERIA- 2. ARCHEA- 3. EUKAYRA- INCLUDES THE PROTIST,

FUNGI, PLANTS AND ANIMALS KINGDOMS KEY- ORGANISMS ARE PLACED INTO

DOMAINS AND KINGDOMS BASED ON THEIR CELL TYPE, THEIR ABILITY TO MAKE FOOD, AND THE NUMBER OF CELLS IN THEIR BODIES

DOMAIN- BACTERIA PROKARYOTES- WHOSE CELLS LACK A

NUCLEUS KEY- FOUND EVERYWHERE IN YOUR

FOOD, ON YOUR DESK, IN YOUR BODY KEY- SOME ARE AUTOTROPHS (MAKE

THEIR OWN FOOD) AND SOME ARE HETEROTROPHS (DON’T MAKE OWN FOOD)

DOMAIN- ARCHEA KEY – NAME MEANS “ANCIENT” FOUND IN DEEP OCEAN VENTS AND

OTHER EXTREME ENVIRONMENTS HOT SPRINGS, SWAMPS, INTESTINES

OF COWS UNICELLULAR PROKARYOTES, AUTO AND HETEROTROPHS

DOMAIN - EUKARYA KEY- SCIENTIST CLASSIFY PROTIST,

FUNGI, PLANTS, AND ANIMALS EUKARYOTES- ORGANISMS WITH

CELLS THAT CONTAIN NUCLEI FROM SEAWEEDS, TO MUSHROOMS,

TO TOMATOES TO DOGS ALL FALL INTO DOMAIN EUKARYA

BRAINPOP http://www.brainpop.com/science/diversityo

flife/sixkingdoms/

WRITE THE QUESTIONS AND ANSWERS 1- WHY DO BIOLOGIST CLASSIFY? 2- LIST THE LEVELS OF

CLASSIFICATION BEGINNING WITH DOMAIN

3- SEARCH THE CLASSIFICATION OF HUMANS. NAME THE EIGHT LEVELS.