Classification: domains, kingdoms and scientific names
Grade 9 Science Worksheet - Challenge Me
Circle the best answer.
“Tree of life (real groups, not to scale):” Ari reads a tree and the list of levels. How many of the eight levels do the dog and Haloarcula marismortui share?
- Two: they share a domain and a kingdom
- Zero: they sit in different domains
- Eight: they are both cells, so they share each level
- One: they share a kingdom, which is the top level
“Tree (real groups, not to scale):” Bo reads a nested tree. How many of the eight levels do the dog and the honey mushroom share?
- Zero: the kingdoms differ, and kingdom is the top level
- Two: the domain and the kingdom, since fungi are close to animals
- One: the domain Eukarya, since the kingdoms differ
- Eight: both are in Eukarya, so they share each level
Read this first
Dog and wolf (real facts)
level dog wolf genus Canis Canis species lupus lupus extra subspecies name familiaris not used here Esme reads two names. The dog is a subspecies of the wolf. How many of the eight levels do the dog and the wolf share?
- Eight: domain through species
- Nine: the subspecies counts as a ninth level
- Seven: domain through genus
- Six: domain through family
Hippopotamus, pig and whale (real facts)
observation fact what a hippopotamus resembles more a pig, not a whale what DNA analysis suggests the hippopotamus may be the closest living relative of the whale Jun reads that a hippopotamus looks more like a pig than a whale. Why can DNA evidence still move it nearer the whale?
- A grouping is fixed once scientists name it, so a DNA result cannot change where the hippopotamus sits
- DNA copies body shape, so it matches how animals look in any grouping
- Looks can mislead, so DNA evidence can place a hippopotamus nearer the whale
- A hippopotamus has no DNA that scientists can compare
How prokaryotes were grouped (real facts)
period grouping until the 1970s all prokaryotes counted as bacteria later two domains, Archaea and Bacteria reason for the change large genetic differences Kira knows Archaea and Bacteria cells both lack a nucleus. Why are they now two separate domains?
- Their genes differ so much that DNA evidence supports two branches
- Both lack a nucleus, so Archaea are still a kind of Bacteria
- Archaea cells have a nucleus, which Bacteria cells lack
- Archaea cells are far larger than Bacteria cells
Horizontal gene transfer (real facts)
feature fact meaning genes pass between unrelated species common in Bacteria and Archaea in Eukarya rarer and less important Luz learns that genes can pass between distantly related species. What does this do to a simple branching tree?
- It complicates the simple tree, so scientists test new models
- It merges Bacteria and Archaea into one species
- It shows that Bacteria and Archaea are not prokaryotes
- It changes nothing, since a tree already shows these links between branches
Notebook
Notes on the wolf's name (classmate's notebook), 4 lines. Columns: line, entry. Line 1: The wolf's scientific name has two words, Canis lupus. Line 2: The first word, Canis, is the genus and starts with a capital letter. Line 3: The second word, lupus, names the wolf by itself, so Canis can be dropped. Line 4: Both words are written in italics.
Noah reads a classmate's notebook about the wolf's name. Which line has the mistake?
- Line 3: the species word needs its genus to make a scientific name
- Line 4: scientific names are written in plain type, not italics
- Line 1: a scientific name needs three words
- Line 2: the genus Canis is not needed, since lupus alone names the wolf
Notebook
Notes on a dog and a cat (classmate's notebook), 4 lines. Columns: line, entry. Line 1: The dog and the cat are both in class Mammalia. Line 2: They are also both in order Carnivora. Line 3: Sharing an order means they must share a genus too. Line 4: Counting from domain, they share five levels.
Pia reads a classmate's notebook about a dog and a cat. Which line has the mistake?
- Line 4: they share eight levels, not five, when counting from domain
- Line 3: sharing an order does not mean sharing a genus
- Line 1: the dog and the cat are in different classes
- Line 2: the cat is not in an order with the dog
Bacteria and Archaea compared (real facts)
feature Bacteria Archaea nucleus no no peptidoglycan in the wall yes no lipid link in the membrane ester bond ether bond Tala reads a comparison of two groups of cells. Which claim and reason fit best?
- Archaea are their own domain, since their walls and lipids differ from Bacteria
- Archaea belong with Eukarya, since their cells have a nucleus inside
- Archaea are their own domain, since their cells are far larger than Bacteria cells
- Archaea belong inside Bacteria, since both lack a nucleus in their cells
Names of the wolf and the dog (real facts)
animal scientific name wolf Canis lupus dog Canis lupus familiaris Zee reads two scientific names. Which claim and reason fit best for the wolf's scientific name?
- Canis is the name, since the genus is the lowest level
- lupus is the name, since the species word names the wolf alone
- Canis lupus is the name, since it joins the genus and the species
- Canis lupus familiaris is the name, since the wolf is a subspecies of the dog