Create an account
the science of grouping organisms according to their characteristics and evolutionary history.
become more similar in appearance
As we move through the biological hierarchy from the kingdom to species level, organisms ____________________.
it doesn't seem to fit into either category
A mushroom is difficult to classify in Linnaeus's two-kingdom classification system because _______________________.
Which of the following was not a consideration for Carolus Linnaeus when he developed his system of nomenclature of organisms?
Which scientist developed the system of classifying organisms by assigning them a genus and species name?
A shark's skeleton is made of cartilage while a dolphin's skeleton is made of bone. This is one reason the two organisms are placed in different _________________.
Because both organisms in the diagram are vertebrates, they are classified in the same ___________________.
Poison ivy is also known as Rhus toxicodendron. Its species identifier is ___________________.
The scientific name of an organism A. varies according to the native language of scientists. B. is the same for scientists all over the world. C. may refer to more than one species. D. may have more than one genus name.
Scientists don't use the common names of organisms because A. an organism may have more than one common name. B. common names are too ambiguous. C. an organism rarely has the same name in different languages. D. All of the above
Organisms in different genera
_____________________ may share the second word of their scientific names, may be in the same family, and may be in different orders.
Be more similar than 2 organisms in different classes, Be in the same class,and have the same species identifier
Two organisms in the same order but different families may ________________________.
kingdom, phylum, class, order, family, genus, species.
The correct order of the biological hierarchy from kingdom to species is _________________.
Quercus rubra : Quercus phellos :: A. Anolis carolinensis : Parus carolinensis B. Erithacus rubicula : Turdus migratoria C. Aphis pomi : Aphis gossypii D. carp : goldfish
chemical, physical, and behavioral
Today, biologists classify organisms by their _____________, ______________, and ______________ similarities.
________________ depict presumed evolutionary relationships based on a variety of types of evidence.
the common ancestor
The organism at the base of a phylogenetic tree is __________________ of all the organisms depicted in the tree.
The DNA sequences of 2 species of sharks would: A. be more similar than the DNA of a shark and a dolphin B. show no differences C. be very close to the DNA sequences of a dolphin D. indicate how sharks evolved
morphology, embryological development, and amino acid sequence proteins
Which types of characteristics are used in taxonomy to organize organisms? ___________________, _____________________, and __________________
Both halves of the arthropod would die, while both halves of the vertebrae embryo would become whole twin organisms.
What would happen if an early arthropod and early vertebrae embryo were split?
cladogram : evolutionary relationships
analogous characters: convergent evolution :: _________________
Each unique character in a cladogram that is used to assign an organism to a group is called a ________________.
Nearly all single celled eukaryotes that are either heterotrophic or photosynthetic belong to the kingdom _________.
Most multicellular, nucleated autotrophs that carry on photosynthesis belong to the kingdom ____________.
Multicellular, nucleated heterotrophs that always obtain food by absorbing nutrients from the environment belong to the kingdom _____________.
An organism that breaks down organic matter, which it then absorbs is in the kingdom ______________.
cells walls, cell membranes, and gene architecture
Archaebacteria can be distinguished from eubacteria because of their differences in their ___________, _____________, and ___________
Simple, non-nucleated organisms that use hydrogen to produce methane are in the kingdom ______________
rRNA; embryological, fossil, morphological, and a variety of molecular
The three domain system of classification is based on similarities and differences in ___________ evidence. The six kingdom system is based on the similarities and differences in ___________ evidence
Aristotle classified plants into three categories on the basis of differences in their ____________________.
The more classification categories two species share, the more ____________________ they have in common.
Biologists of Linnaeus's time classified every living thing as either plant or ____________________.
All scientific names are made up of two words that are often derived from the ____________________ language.
The first word of a scientific name is the ____________________ to which the organism belongs.
anterior end of digestive system
Most invertebrates, such as the arthropods, follow a pattern of development in which the blastopore becomes the ____________________.
Eukaryotic organisms that lack specialized tissue systems are members of the kingdom ____________________.
Please allow access to your computer’s microphone to use Voice Recording.
Having trouble? Click here for help.
We can’t access your microphone!
Click the icon above to update your browser permissions and try again
Reload the page to try again!Reload
Press Cmd-0 to reset your zoom
Press Ctrl-0 to reset your zoom
It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.
Please upgrade Flash or install Chrome
to use Voice Recording.
For more help, see our troubleshooting page.
Your microphone is muted
For help fixing this issue, see this FAQ.
Star this term
You can study starred terms together