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How Has Dna Sequencing Affected The Science Of Organisms

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Sandra Watson
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Pre-Lab Questions

1. Use the following classifications to determine which organism is least related out of the three. Explain your rationale.

Table 2: 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

Notophthalmus

Species

cinerea

bombina

viridescens

2. How has DNA sequencing affected the science of classifying organisms?

3. You are on vacation and see an organism that you do not recognize. Discuss what possible steps you can take to classify it.

Post-Lab Questions

1. What do you notice about the options of each step as they go from number one up?

2. How does your answer from Question 1 relate to the Linnaean classification system?

Exercise 1: Classification of Organisms

Table 2: Key Characteristics of Some Organisms

Organism

Kingdom

 

Domain

Defined Nucleus

Motile

Cell Wall

Photosynthesis

Unicellular

E. coli

 

Yes

 

Yes

Protozoa

 

Yes

Yes

 

Yes

Mushroom

 

Yes

 

Yes

  

Sunflower

 

Yes

Yes

Yes

 

Bear

 

Yes

Yes

   

 

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Post-Lab Questions

1. Did this series of questions correctly organize each organism? Why or why not?

2. What additional questions would you ask to further categorize the items within the kingdoms (Hint: think about other organisms in each of the kingdoms and what makes them different than the examples used here)?

3. What questions would you have asked instead of the ones that you answered above when classifying the organisms?

 

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