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Question;LAB 4;1. Answer;the following questions;a. List four cell structures that are common to;both plant and animal cells. (4 points);b. What;structures are unique to plant cells? (2 points);c. What;structures are unique to animal cells? (2 points);2. List;five structures observed in the cell images and provide the function of each;structure. (5 points);3.;William is observing a single-celled organism under a microscope and notices;that it has a nucleus and is covered in small, hair-like structures.;A.;Provide a probable name for this organism (1 point);B.;Explain why William came to this conclusion. (2 points);4. Where;in the cell are the chloroplasts located? (5 points);5. In the;Spirogyra cells observed on the virtual microscope, about how many circular;green chloroplasts were seen in a single cell at 40X magnification? (2 points);6. What;were the percent differences between the volumes of the potatoes in the osmosis;experiment for each salt solution? (8 points);7. What;extraneous variables might have affected how the results came out in the;osmosis experiment? Describe three. (6 points);8. In;osmosis, which direction does water move with respect to solute concentration?;(2 points);9. Answer;the following questions;a. Explain what would happen to a freshwater unicellular;organism if it were suddenly released into a saltwater environment. Use the;terms isotonic, hypotonic and hypertonic in the answer. (3 points);b. What would happen if a marine organism were;placed in freshwater? (3 points);10. A;student purchases and weighs 5 pounds of carrots from a local grocery store.;She notices that the grocery store constantly sprays its produce with distilled;water. After returning home, she weighs the carrots again and discovers that;they weigh only 4.2 lbs. They also no longer seem as crisp and taut. Provide a;possible explanation for why the carrots weighed more at the store, based on;the information learned in this lab. (5 points);11.;People always say that leeches can be removed from the body by pouring salt on;them. Based on what the student learned about osmosis, provide an explanation;that supports or refutes this information. (5 points);12. What is the rate of diffusion for the potato;cubes from the surface-to-volume experiment (procedure 3b)? (6 points);13.;Assume the potato cubes are cells. Which cube would be most efficient at moving;materials into and out of the cube? Briefly explain the answer. (4 points);14. From;what was observed in the potato procedure, how do the rate of diffusion and;surface-to-volume ratio limit cell size? (5 points);15. One;night, Hans decides to cook a hamburger and spaghetti with meatballs. To test;ideas of surface-to-volume ratios, he makes a quarter pound hamburger and a;quarter pound meatball and cooks them at the same temperature. Which food item;will cook the fastest and why? (5 points);16. While;watching a special on animals, Brianna discovers that hares tend to lose heat;through their ears. Based on this and what is known about surface-to-volume;ratios, propose an explanation as to why hares that live in hot climates (such;as the desert) have large, extended ears. (5 points);17.;(Application) How might the information gained from this lab pertaining to cell;structures and diffusion be useful to a student employed in a healthcare;related profession? (20 points).


Paper#62769 | Written in 18-Jul-2015

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