Domains & Taxonomy
This largest rank groups life into Bacteria, Archaea, and Eukarya.
What is DOMAIN?
This Swedish scientist created the two-part naming system still used today.
Who is Carolus Linnaeus?
This kingdom contains multicellular organisms that make their own food and have cell walls.
What is Plantae?
Observable traits scientists compare to see if organisms are related.
What are physical characteristics?
The science of describing, classifying, and naming organisms is called this.
What is Taxonomy?
The first part of a scientific name; it is always capitalized.
What is GENUS?
This kingdom contains organisms that absorb nutrients and have cell walls but no chloroplasts.
What is Fungi?
Name one chemical characteristic scientists use to determine relatedness.
What is genetic material/DNA?
Mnemonic "Do Kings Play Chess..." — the "K" stands for which level?
What is Kingdom?
The second part of a scientific name; it is most specific and always lowercase. It indicates organisms that can interbreed.
What is SPECIES?
Name the kingdom that can be single-celled or simple multicellular and includes algae and slime molds.
What is Protista?
Scientists compare how organisms change from egg to adult; this kind of evidence is called this.
What is DEVELOPMENTAL evidence?
In the eight-level system, this level is more specific than Family and less specific than Species.
What is Genus?
Give two reasons scientists prefer scientific names over common names.
They avoid confusion from many regional common names and provide a universal naming system.
Give two characteristics distinguishing Animalia from Plantae.
Animals lack cell walls and usually can move; plants have cell walls and make their own food.
Scientists compare the types of proteins animals make. If two animals have many of the same proteins, what does that suggest about their relationship?
They are likely closely related.
Give two parts of "Cell Theory."
What is, "all living organisms are composed of one or more cells, cells are the basic unit of structure and function in organisms, and all cells arise only from pre-existing cells."
Format the mountain lion's scientific name exactly as described in the lesson.
Puma concolor (genus capitalized, species lowercase; italicized or underlined)
Explain why some organisms are hard to place in a kingdom and give one example from the lesson.
New or unusual organisms may show mixed traits and not fit existing groups; example: Euglena or sea spiders.
Scientists can compare DNA letters (the DNA code) between organisms. If two organisms have very similar DNA sequences, what does that tell scientists?
The organisms share a recent common ancestor (they are closely related).
Because scientists discover new organisms.
Because new evidence becomes available.
Because technology improves.
Because scientists learn more about DNA.
Because earlier systems were incomplete.
Because organisms do not always fit neatly into groups.
Why do classification systems change? Give two answers.