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Biology Taxonomy Worksheet
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Uploaded: 4 years ago
Category: Biology
Type: Assignment
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Filename: IB_1201_L12_Taxonomy.docx
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Page Count: 3
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Transcript
Pre-Lab Questions
Use the following classifications to determine which organism is least related out of the three. Explain your rationale. The Eastern Newt is least related out of the three. The Eastern Newt may be in the same domain, kingdom, and phylum, but it is not in the Anura order.
Classifications
Classification Level
American Green Tree Frog
European Fire-Bellied Toad
Eastern Newt
Domain
Eukarya
Eukarya
Eukarya
Kingdom
Animalia
Animalia
Animalia
Phylum
Chordata
Chordata
Chordata
Class
Amphibia
Amphibia
Amphibia
Order
Anura
Anura
Caudata
Family
Hylidae
Bombinatoridae
Salamandridae
Genus
Tursipops
Bombina
Notophthalamus
Species
Cinera
bombina
viridescens
How has DNA sequencing affected the science of classifying organisms? Scientists can compare the genes of organisms at a molecular level. Before scientists could only examine the physical traits of an organism but now they can see the genes that cause them. Scientists can now also see if two organisms are related by examining their genes.
You are on vacation and see an organism that you do not recognize. Discuss what possible steps you can take to classify it. I could compare the physical traits of the organism to those of others I am familiar with to possibly determine if it is related. Even if I am unaware of it’s name I might research some of its distinctive traits such as a large triangular beak or its color if it’s a bird.
Exercise 1: Dichotomous Key Practice
Result Tables
Table 2: Dichotomous Key Results
Organism
Binomial Name
i
Selasphorus platycercus
ii
Mus musculus
iii
Vaccinium oxycoccus
iv
Ramphastos vitellinus
v
Quercus alba
vi
Euathlas smithi
vii
Helix aspersa
viii
Taeniopygia guttata
ix
Lonicera japonica
x
Carduelis tristis
xi
Oryctes nasicomis
xii
Dryocopus pileatus
xiii
Musa acuminata
Post-Lab Questions
What do you notice about the options at each step as they go from number one up? As you go down the list, it becomes more and more specific until it has been narrowed down enough.
How does your answer from Question 1 relate to the Linnaean classification system? The classification system starts with a general term and slowly narrows down the possible answers.
Exercise 2: Classifications of Organisms
Result Tables
Table 3: Classifications
Organism
Domain
Kingdom
Defined Nucleus
Motile
Cell Wall
Photosynthesis
Unicellular
E. Coli
Bacteria
No
Yes
Yes
No
Yes
Protozoa
Eukarya
Protista
Yes
Yes
No
No
Yes
Mushroom
Eukarya
Fungi
Yes
No
Yes
No
No
Sunflower
Eukarya
Plantae
Yes
No
Yes
Yes
No
Bear
Eukarya
Animalia
Yes
Yes
No
No
No
Post-Lab Questions
Did this series of questions correctly organize each organism? Why or why not? If I answered all of the questions correctly than yes they should be correctly organized.
What additional questions would you ask to further categorize the organisms within the kingdoms (Hint: think about other organisms in the kingdom and what makes them different than the examples used here)? Another possible question (mainly for bacteria) is does it have membrane bound organelles.
Do you feel that the questions asked were appropriate? What questions would you have asked? One of the first questions I asked was can it move. Obviously a mushroom or sunflower can’t. Second was can it photosynthesis. The only one on the list which could was the sunflower.
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