Egg Dissection Lab

One of the limitation was that the experiment was unable to simulate the effects of predation. In an actual environment some of the brine shrimp eggs could have been eaten before they are able to hatch, but since this was in a petri dish there was no such thing as predators that have reduced the hatching viability of the brine shrimp eggs. Another, limitation was the exact amount of brine shrimps you could brush up. This made the hatching viability to not be as accurate because there was different amount of eggs to start with. If there was an equal amount of eggs to begin with the hatching viability percentage would have been more accurate since they all started the same. These two limitations made the experiment not as reasonable because it stopped what could have happen to these brine shrimps in their actual

The solutions are 0% sucrose, 10% sucrose, 20% sucrose, 30% sucrose, 40% sucrose and an unknown sucrose concentration. We then weighed each egg separately to the nearest gram in order to have an initial starting weight to compare to the results throughout our experiment being conducted. The eggs were then placed in each beaker for 12 intervals at a time. After every 12 minutes the eggs were taken out and weighed to see if the weight of the egg changed. With a total of five intervals (12, 24, 36, 48, 60) the steps were repeated till the egg had reached the total time of 60 minutes. The changes in weight of the eggs were then added into a data table showing the weight of the chicken eggs in grams vs. the time in minutes. In a second data table the weight changes (g) vs. time (min.) between the eggs were taken and used the difference from each time and subtracted it from the initial

The egg shell completely disappears due to the vinegar reacting with the egg; bubbles form on the surface of the vinegar and on the egg because carbon dioxide was produced from

The primary purpose of the lab was to test and observe the effects of the process of osmosis on decalcified eggs. Before the process, the initial weights of the eggs were taken and noted. Two eggs were then immersed in a deionized water solution. The same was repeated to the other two solutions of 20% and 40% sucrose. The weights of the eggs were measured after 15 minutes to note the change in mass due to osmosis and again after 60 minutes to take the final measurement. Overall, while some human error might arise in the weighing process, care was taken in handling the eggs and during the weighing process. As such, it was found that the eggs behaved as predicted. It was found that the eggs placed in the hypertonic solution lost

The materials used during the experiment included three plastic cups, three gummy bears, masking tape, marker, balance, calculator, tray, one plastic spoon, a measurement tray, and a ruler. The three plastic cups were used to hold the tap water, salt water, and sugar water. The masking tape and marker were used to label each cup with the

To approach this problem, eggs of the brine shrimp were placed in 5 different solutions with different salinity. By observing how many eggs hatch per given number of eggs in the solution, the hatching viability was calculated for each solution.

For this project, I made a capsule for an egg that is to be dropped from about twenty feet. This capsule that I made was not what I was thinking at first but when I started to build it, I saw that this capsule would hold better than the one that I was thinking which was a triangular capsule with the egg in the middle but I saw later one that the egg would break if it hit one of the flat sides. The capsule is a cube that is made out of the tongue depressors and I used most of the yarn for the big cage and I used the Elmer’s glue to glue the tongue depressors together. I used pieces of the paper clips to hold the popsicle sticks together with the tongue depressors and some

The water in the hot bag was approximately 65° Celsius. We allowed the shrimp to move about for 30 minutes because we had the time. Every 10 minutes we replaced the hot water in the bag with fresh hot water because it was slowly cooling down. After the 30 minutes were up we closed the clamps and removed the hot and cold bags from the tubing and counted the number of shrimp in each section and recorded our results. We did not count any dead shrimp because that condition would obviously not be a condition they could survive in. In this part of the lab we measured the temperature of water from each section and recorded that number also. We did this by simply pouring the water from each section into 4 different test tubes and placing a thermometer in each.

The lid was then placed on the jar and an observation was made and recorded. Observations of the egg were then made after 12 hours and 24 hours had passed and the observations were recorded. After 24 hours had passed, the egg was removed from the syrup and rinsed with tap water and observations were made and recorded.

An egg has a semi-permeable membrane, thus processes like osmosis could occur. Osmosis is the movement of water molecules from an area of higher water concentration to an area of a lower water concentration. Osmosis is important, especially for living organisms, as they help distribute nutrients in the body. An egg’s mass would change when it is soaked in different substances. The goal of this experiment was to investigate how an egg changes through osmosis. This experiment was done to show how substances affect the mass of an egg. To start off, an egg’s mass was measured by putting the egg in a beaker then placing it on a mass scale. The beaker was then filled with vinegar and left alone for twenty-four hours. After a day, the egg was taken

This is the final step of the experiment. The shell-less egg was now placed into a new cup, but very carefully, as the egg was more fragile than when it was soaked in vinegar. The egg in the new cup was then covered with water. The egg sat in the water for a 24 hour time period once again. During this 24 hour time period the eggs appearance and size were once again recorded. After the time period had completed, the egg was removed from the water and was very carefully patted dry. Since the egg was now swollen, extra care was needed when holding the egg. The swollen egg was placed on the scale on last time and its mass was recorded as M3.

In conclusion, the data that was collected helped tell us that the solutions greatly affected the cell of the egg because it caused the egg’s mass to increase than decrease. Also saw how the solutions played a role in the phospholipid bilayer and saw how it altered the shape of the egg. However, it does not support my hypothesis on the affect the egg would undergo onced placed in sugar and water but sugar was not used in this experiment, but water was used and it didn’t affect the shape of the egg, all it did was cause the egg to be in a isotonic state. According to Khan Academy (2017), states that a cell is isotonic “When the extracellular fluid has the same osmolarity as the cell, there will be no net movement in or out of the cell”. Which

The eggs were each individually placed in one of the beakers and were taken out and weighed every 15 minutes for 60 minutes. Weighing the eggs helped to test the process of osmosis by finding out the mass before and after soaking in water, this will dictate whether water has moved in or out of the egg.

Cells in all living things have an outer layer known as the cell membrane. The structure of the cell membrane consists of the phospholipid bilayer organized by the arrangement of hydrophilic heads and hydrophobic tails. It is a selectively permeable membrane, where it divides the outer environment from the interior of the cell. It can control substances moving in and out of living cells. Certain molecules like gases, water, and food are permitted to pass the membrane through the method of diffusion. Diffusion refers to the process in which molecules move on the concentration gradient, where they move from an area of high concentration to an area of low concentration. A type of diffusion is known as osmosis. It is the diffusion of water moving across the selectively permeable membrane. In this lab, students will be using eggs to construct an experiment to get a better study on how osmosis works in a cell. The eggs will be soaked in vinegar solution to remove their shells to expose each inner layer that resembles a selectively permeable membrane. The egg shell is composed of calcium carbonate that would dissolves in acidic solution such as vinegar. In the chemical reaction, it releases carbon dioxide gas. After the removal of the egg shell, it will be ready to be able to construct the experiment.

Videos of proper dissection of the organisms were studied prior to the dissections to prevent any unnecessary damage to the organisms that could lead to errors in our data. For each organism, a scalpel was used to pierce the skin and a pair of scissors was used to open up the organism. If the organism had several layers of skin (i.e. the bullfrog and perch), then forceps and a scalpel were used relieve the tension and peel the layers away from the organs or the chest cavity. Once the external layers of the organisms were cut away from the organs, those layer were pinned back with dissection pins to assure the stability of organism and clarity of the dissection. The unneeded organs were cut out and discarded while important organs, those in