Dichotomous key

standards

GSE S7L1: Obtain, evaluate, and

communicate information to investigate the

diversity of living organisms and how they can

be compared scientifically.

GSE 7L1a:Develop and defend a model that

categorizes organisms based on common

characteristics.

Learning Target:

I can use a dichotomous key to identify an organism

Review:Taxonomy is the branch of

biology concerned with classifying and naming of organisms

Biologists who study this are called taxonomists

A cell is the basic unit of all living things

Organisms is any living thing.

Carolus Linnaeus developed a classification system based on similarities between organisms (plants/animals)

Levels of classificationKingdom: it is the first and largest category

in classification.

Species: it is the last and smallest category.

Kingdom (KING) Phylum (PHILIP)Class (CAME)Order (OVER)Family (FOR)Genus (GRAPE)Species (SODA)

SIX KINGDOMS

ArcheabacteriaEubacteriaProtistaFungiPlantaeAnimalia

Binomial nomenclature is a system/method used to name organisms. It consists of two italicized names. The first capitalized(genus) and the second lowercase (species).

Common Name: Cat

Scientific Name: Felis catus

Dichotomous Key

Is a tool used to identify organisms.

Tool to find organisms scientific name

At every step it has two questions. .

These questions will be answered .

as yes or no.

How dichotomous

key works?

https://www.youtube.com/watch?v=wpKulkADzBk

Here are some unknown plants/

organisms

choose only one

organism at a time

Remember one at a time

Read [question]steps 1a and 1b1a] the plant has yellow flowers

1b] the plant has pink flowers

Decide which statement is true

1b is true

1a] plant has yellow flowers

….go to question number 2

1b] plant has pink flowers

…..go to question number5

so go to question number 5

At question number five you again have two choices

5a] plant leaver are wide

…………..go to question 6

5b] plant leaves are long /thin

…………. Day Lilly

so step 5 gave you the name DAYLIILY for the plant

Now you can start working on the next

plant.

Remember one organism at a time

Always start at question number 1