Dichotomous Key and Cladogram
Vocabulary
Characteristics of Life
Classifying Organisms
Exploring Life
100
What is a dichotomous key?
a series of questions used to identify an unknown organism
100
Cell
the smallest unit of life
100
Which of the following is NOT a characteristic of life?
a. reproduction
b. growth and development
c. use of energy
d. multicellular organization
d. multicellular organization
100
The first word in a two-word name of an organism identifies its __________.
genus
100
What is magnification?
the ability to make objects appear larger than they are
200
What is a cladogram?
a branched diagram that shows how organisms are related
200
Organism
things that have all the characteristics of life
200
What characteristic of life can you identify in this image?
The tadpole grows and develops, into a frog, and reproduces.
200
What is the process by which organisms make new organisms?
Reproduction
200
What type of microscope uses a series of lenses to magnify an image?
Compound Light Microscope
300
Which tool is used to identify orgnaisms?
dichotomous key
300
Genus
a group of similar species
300
A longnose snake sunning itself on a rock to raise its body temperature is demonstrating which characteristic of life?
a. organization
b. homeostasis
c. use of energy
d. reproduction
b. homeostasis
300
Which person devised an animal classification system 2,000 years ago?
Aristotle
300
__________ is the change in apparent size produced by a microscope.
Magnification
400
Which animals on a cladogram are closely related to each other?
organisms to the right of a characteristic notes on the cladogram are more closely related
400
Homeostasis
an organism's ability to maintain steady internal conditions when outside conditions change
400
In what way is a unicellular organism similar to a house with various rooms for various functions?
A unicellular organism has structures that perform specialized functions. Those structures are similar to the rooms of a house.
400
What evidence is used to classify living things into groups? (There are 5).
1. cell type
2. habitat
3. how the organism obtains food and energy
4. common ancestry
5. molecules within an organism
400
If a microscope has an eyepiece lens with a power of 25X and an objective lens with a power of 50X, what is the microscope's total magnification power?
1,250x
500
How do the questions of a dichotomous key help the reader identify an organism?
the questions refer to specific characteristics of a group of similar animals
500
Binomial Nomenclature
gives each organism a two- word scientific name
500
How do living things differ from nonliving things?
Living things are organized, grow and develop, reproduce, respond, maintain certain internal conditions, and use energy.
500
Which person developed the basis of the system of organism classification in use today?
Linnaeus
500
What units could be used to measure resolution?
a. microseconds
b. micrograms
c. micrometers
d. microliters
c. micrometers