Dichotomous Key
Classifying Organisms
Kingdom
Characteristics
Challenge
100
Two-part naming tool that helps scientists identify organisms by answering a series of yes/no questions about traits is
Dichotomous Key
100
Cells that have no nucleus and no membrane.
Prokaryotic
100
Which Kingdom do these organisms belong?
Protists
100
How are organisms classified by scientists?
In a hierarchical system of shared characteristics.
100
Species that are multi-celled, have nuclei, and photosynthesize are in which Kingdoms?
Plantae and Protista
200
Move from observing the most obvious traits to the most specific traits.
Best way to develop a dichotomous key.
200
Which cell is the smallest?
Prokaryotic
200
How many Kingdoms are there?
6
200
True or False: Most organisms in Kingdom Archaebacteria live in extreme environments
True
200
Correct classification system order is _________
Kingdom, Phylum, Class, Order, Family, Genus, Species
300
When using a Dichotomous Key each questions give you ________________.
two choices that lead to different results
300
Purpose of a standardized taxonomic system.
to replace confused names with less confused names.
300
Which Kingdom has all Multi-celled heterotrophs
Animalia
300
True or False: Most organisms in Kindgom Eubacteria live in moderate environments.
True
300
True or False
Fungi cells contain chloroplasts.
False
400
Why must a dichotomous key be based on observable traits?
To be able to figure out the Scientific Name of the organism.
400
Plant cell and bacterial cell both have a _____________.
Cell Wall
400
Which kingdom contains single-celled organisms that live in extreme environments.
Archaea
400
What's the difference between abiotic and biotic?
abiotic is non-living
biotice is living
400
Which Kingdom is described:
Eukaryotic
Mostly multi-celled, but some are single-celled
can be heterotrophs or autotrophs
Kingdom Protista
500
What physical features does a Dichotomous Key use?
wings, feet, skin, shape, size
500
Organisms that make their own food.
Autotrophs
500
Which Kingdom contains mushrooms, mold, and yeast?
Fungi
500
What is the difference between autotroph and heterotroph?
Autotroph-make their own food
Heterotroph-get their food from other sources.
500
A student makes a dichotomous key to identify animals, but two of the questions ask about the same trait. What problem does this cause?
It causes confusion and may lead to misidentification, because each step in a dichotomous key must ask about a different trait.