1.What is the water potential of an open beaker containing pure water?

2.Why don’t red blood cells swell or shrink in blood?Because red blood cell is isotonic when it is in blood.

3.How do osmotic power plants work?

4.Research the structures that protect plant and animal cells from damage resulting from osmotic pressure. Write a few paragraphs explaining what they are, how they work, and where they are located.

EXPERIMENT 1: TONICITY AND THE ANIMAL CELL

Hypothesis

Data

Data Tables

Table 1: Osmosis Results

Solution Type	Volume (mL) Before Osmosis	Volume (mL) After Osmosis
100% Distilled Water
100% Corn Syrup
10% Corn Syrup/90% Distilled Water
Control

 

Table 2: Observations of Eggs After Osmosis

100% Distilled Water	100% Corn Syrup	10% Corn Syrup/ 90% Distilled Water	Control

Post-Lab Questions

1.Record your hypothesis from Step 15 here. Be sure to include scientific reasoning to support your predictions.

2.How do each of the three eggs placed in solution compare to the control egg?

3.For each beaker, identify whether the solution inside was hypotonic, hypertonic, or isotonic in comparison to the control beaker.

4.What was the direction of osmosis in the beaker labeled “100% distilled water”? Did the egg in this beaker burst?

5.Was there any liquid in the “control” beaker after 24-48 hours? If so, why do you think this is? If not, why do you think this is?

6.Which solution contained a dehydrated cell? Think about someone with a high sugar diet. Hypothesize how their cells might be affected by osmosis.

EXPERIMENT 2: TONICITY AND THE PLANT CELL

Data Tables

Table 3: Water Displacement per Potato Sample

Potato Type	Potato Observations	Sample	Initial Displacement (mL)	Final Displacement (mL)	Net Displacement (mL)
		A
		B
		A
		B

 

Post-Lab Questions

1.How did the physical characteristics of the potato vary before and after the experiment? Did it vary by potato type?

2.What does the net change in the potato sample indicate?

3.Different types of potatoes have varying natural sugar concentrations. Explain how this may influence the water potential of each type of potato.

4.Based on the data from this experiment, hypothesize which potato has the highest natural sugar concentration. Explain your reasoning.

5.Did water flow into or out of the plant cells (potato cells) in each of the samples examined? How do you know this?

6.Would this experiment work with other plant cells? What about with animal cells? Why or why not?

7.From what you know of tonicity, what can you say about the plant cells and the solutions in the test tubes?

8.What do your results show about the concentration of the cytoplasm in the potato cells at the start of the experiment?

9.If the potato is allowed to dehydrate by sitting in open air, would the potato cells be more likely to absorb more or less water? Explain.

 

Order Number			45471455714
Type of Paper			Essay
Writer Classification Level			Undergraduate
Style of Writing			MLA/APA/CHICAGO/
Sources and References			5
Number of Pages			4
	Distinguished (100%)	Proficient (85%)		Basic (70%)	Below Expectations (50%)	Non-Performance (0%)
Thesis Statement	Raises the strongest   objection to the thesis presented in the assignment. The objection is strongly grounded in research and logical reasoning.	Raises a plausible objection to the thesis presented in the assignment. The objection is mostly grounded in research and logical reasoning.		Raises an objection to the thesis presented in the assignment. The objection is somewhat grounded in research and logical reasoning.	Attempts to raise an objection to the thesis presented in the assignment. The objection is minimally grounded in research and logical reasoning.	The objection to the thesis is either nonexistent or lacks the components described in the assignment instructions.
Counter Argument	Provides a strong, thorough rebuttal to the objection. The rebuttal effectively demonstrates that the thesis can withstand the objection and applies the principles of charity and accuracy.	Provides a rebuttal to the objection. The rebuttal mostly demonstrates that the thesis can withstand the objection and mostly applies the principles of charity and accuracy.		Provides a limited rebuttal to the objection. The rebuttal somewhat demonstrates that the thesis can withstand the objection and somewhat applies the principles of charity and accuracy.	Attempts to provide a rebuttal to the objection; however, the rebuttal minimally demonstrates that the thesis can withstand the objection and does not apply the principles of charity and accuracy.	The rebuttal is either nonexistent or lacks the components described in the assignment instructions.
Conclusion	Provides clear and concise closing remarks that comprehensively summarize the essay. The remarks consider the broader controversy and/or further research that could offer additional insight into the moral solution of the business problem.	Provides closing remarks that summarize the essay. The remarks mostly consider the broader controversy and/or further research that could offer additional insight into the moral solution of the business problem. The closing remarks are somewhat unclear.		Provides closing remarks that minimally summarizes the essay. The remarks minimally consider the broader controversy and/or further research that could offer additional insight into the moral solution of the business problems. The closing remarks are unclear and/or vague.	Attempts to provide closing remarks that summarize the essay; however, the remarks do not consider the broader controversy and/or further research that could offer additional insight into the moral solution of the business problem. The closing remarks are unclear and vague.	The closing remarks are either nonexistent or lack the components described in the assignment instructions.
Written Communication: Context of and Purpose for Writing	Demonstrates methodical application of organization and presentation of content. The purpose of the writing is evident and easy to understand. Summaries, quotes, and/or paraphrases fit naturally into the sentences and paragraphs. Paper flows smoothly.	Demonstrates sufficient application of organization and presentation of content. The purpose of the writing is, for the most part, clear and easy to understand. There are some problems with the blending of summaries, paraphrases, and quotes. Paper flows somewhat smoothly.		Demonstrates a limited understanding of organization and presentation of content in written work. The purpose of the writing is somewhat evident but may not be integrated throughout the assignment. There are many problems with the blending of summaries, paraphrases, and quotes. Paper does not flow smoothly in all sections.	Organization and presentation of content are extremely limited. The purpose of the writing is unclear. There is little or no blending of summaries, paraphrases, and quotes. Paper does not flow smoothly when read.	The assignment is either nonexistent or lacks the components described in the instructions.
Written Communication: Control of Syntax and Mechanics	– Displays meticulous comprehension and organization of syntax and mechanics, such as spelling and grammar. Written work contains no errors and is very easy to understand.	Displays comprehension and organization of syntax and mechanics, such as spelling and grammar. Written work contains only a few minor errors and is mostly easy to understand		Displays basic comprehension of syntax and mechanics, such as spelling and grammar. Written work contains a few errors which may slightly distract the reader.	Fails to display basic comprehension of syntax or mechanics, such as spelling and grammar. Written work contains major errors which distract the reader.	The assignment is either nonexistent or lacks the components described in the instructions.
Written Communication: Required Formatting	Accurately uses required formatting consistently throughout the paper, title page, and reference page.	Exhibits required formatting throughout the paper. However, layout contains a few minor errors.		Exhibits limited knowledge of required formatting throughout the paper. However, layout does not meet all requirements.	Fails to exhibit basic knowledge of required formatting. There are frequent errors, making the layout difficult to distinguish as required style.	The assignment is either nonexistent or lacks the components described in the instructions.
Written Communication: Word Requirement	The length of the paper is equivalent to the required number of words.	The length of the paper is nearly equivalent to the required number of words.		The length of the paper is equivalent to at least three quarters of the required number of words.	The length of the paper is equivalent to at least one half of the required number of words.	The assignment is either nonexistent or lacks the components described in the instructions.
Written Communication: Resource Requirement	Uses more than the required number of scholarly sources, providing compelling evidence to support ideas. All sources on the reference page are used and cited correctly within the body of the assignment.	Uses the required number of scholarly sources to support ideas. All sources on the reference page are used and cited correctly within the body of the assignment.		Uses less than the required number of sources to support ideas. Some sources may not be scholarly. Most sources on the reference page are used within the body of the assignment. Citations may not be formatted correctly.	Uses an inadequate number of sources that provide little or no support for ideas. Sources used may not be scholarly. Most sources on the reference page are not used within the body of the assignment. Citations are not formatted correctly.	The assignment is either nonexistent or lacks the components described in the instructions.