Posted: January 20th, 2023
1. A red blood cell (0.9% NaCl) is placed into a solution of 20% NaCl. The water is able to mov through the cell membrane, what happens to the red blood cell in this situation? Is this environment (outside solution) that the cell was placed into hypertonic or hypotonic?
2. A red blood cell (0.9% NaCl) is placed into a solution of 100% DI water. The membrane is again permeable to water. What happens to the cell in this situation? Is this environment (outside solution) hypertonic or hypotonic?
3. A plant cell (0.9% NaCl) is placed into a solution of 20% NaCl, the membrane is permeable to water. What happens to the plant cell?
4. A plant cell (0.9% NaCl) is placed into a solution of 100% DI water, the membrane is permeable to water. What happens to the plant cell?
5 A dialysis bag (simulating a membrane) of 15% glucose is placed in a beaker of 5% glucose. The bag is permeable to both water and glucose.
A. What is the net movement of water?
B. What is the net movement of glucose?
C. Which solution in this situation s hypertonic and which is hypotonic?
Rubric for Research Paper
Outstanding – 20pts
Good – 15pts
Fair – 10pts
Unacceptable – 5pts
Excellent section headings, indicative of a steady “flow” to the overall paper. Topics and subtopics clearly indicated.
Good section headings, indicative to a steady “flow” to the overall paper. Topics clearly indicated, could use more subtopics.
Fair section headings, indicative that the paper has “flow”. Topics and subtopics not clearly indicated. Unclear organization of thoughts.
Relevant topics missing or incorrect, paper has no indicative “flow”.
Highly informative, complete and easy to understand. Appropriate vocabulary is used.
Abstract makes you want to read the paper.
Informative, complete and understandable. Appropriate vocabulary is used.
Somewhat informative and understandable.
Not very informative or understandable.
Thesis is clear, easy to find, and appropriate to the assignment.
Thesis is supported by the rest of the paper.
Paper contains a “roadmap” for the reader.
There is a logical “flow” to the topics/arguments. Conclusion follows clearly from the arguments presented.
Thesis is clear and appropriate. Thesis fairly well supported.
Paper is fairly well organized.
Conclusion follows from the rest of the paper.
Thesis is fairly clear.
Inconsistent support for thesis. Paper weakly organized. Conclusion is acceptable.
Thesis unclear and/or inappropriate.
Thesis not supported.
Paper is not organized. Conclusion doesn’t follow from the rest of the paper.
The evidence comes from a wide variety of valid sources. The bibliography is complete and reflects appropriate sources.
The evidence comes from the minimum valid sources. The bibliography is complete.
Valid sources are inconsistently used. The bibliography contains minor formatting errors.
Multiple sources cited incorrectly.
Arguments are pertinent to the topic.
Arguments are logical, supported with evidence. The key arguments have been made – no major points have been left out.
pertinent to the topic. Arguments are fairly logical and reasonably supported.
Most key arguments have been made.
Arguments are not consistently pertinent, logical, or supported. Few key arguments have been made.
Arguments not pertinent. Arguments rarely, if at
all, logical and supported.
Almost no key arguments have been made.
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