You have been assigned to analyze some extraterrestrial material recently collected from Mars. After examining a sample using a microscope you jump up excitedly and shout to your colleagues that you have confirmed the existence of life on Mars. One of your colleagues takes a look at your sample and remarks that all he sees is a single-celled "blob" with little internal structure. Assuming that life on Mars can be classified into similar domains and kingdoms as Earth, to which domain does your "blob" belong?
A. Archaea
B. Fungi
C. Protista
D. Animalia
Clarify Question
1. What is the key concept addressed by the question?
2. What type of thinking is required?
3. What key words does the question contain and what do they mean?
Gather Content
1. What do you know about different domains?How does it relate to the question?
Consider Possibilities
1. What other information is related to the question? Which information is most useful?If the only clue was single celled which could be correct?
Choose Answer
1. Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer?
Reflect on Process
1. Did your problem-solving process lead you to the correct answer? If not, where did the process break
down or lead you astray? How can you revise your approach to produce a more desirable result?
A. Archaea
Clarify Question
1. The question asks you to determining the domain
of a new organism.
2. Apply the criteria of different domains to specific examples.
3. Single celled means that the entire organism contains only one cell.
Internal structure refers to organelles like the nucleus.
Gather Content
1. Protista and fungi both have single celled members, but have internal structures.
Animals are all multicellular and have internal structures.
Archaea are like bacteria and are single celled and do not have internal structure.
Consider Possibilities
1. animals are all multicellular.
2. Protista and fungi both have single celled
members,
Choose Answer
1. All members of the domain Archaea are single celled and do not have internal structure, so this is the best answer.
Reflect on Process
1. This question asked you to apply the characteristics of different domains to specific examples to classify an unknown organism.If you got the correct answer, great job! If you got an incorrect answer, where did you get stuck? While three of the domains listed have single celled organisms, only one lacks internal structures.
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A. insertion B. transition C. frameshift D. transversion
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