Diffusion moves down the concentration gradient, which is the difference in the concentration of molecules across a space”. “Osmosis will occur when there is an uneven distribution of solute in a solvent. The higher the solute in solvent, then there will be a higher rate of osmosis through the diffusion gradient forming a hypertonic or hypotonic solution. Solvent with equal or no solute forms an isotonic solution”. Hypothesis : When the quails’ eggs are immersed into 0% (distilled water), 5%, and 15% concentration of sodium chloride solution, the final mass of the quails’ eggs will increase.
Most animals need to stay at roughly the same temperature so heat is also exchanged. The larger the surface area to volume ratio is the easier it will be for the animals to perform these exchanges. Gas exchange surfaces have to main adaptations, large surface area and they are thin, they will both increase the rate of diffusion. Single celled organisms don’t require gas exchange systems because they can absorb and release gases by diffusion through there outer surface because they have a relatively large surface area. Large organisms require gas exchange systems to acquire all the oxygen they need, fish for example have special adaptations because there is less oxygen in the water than in the air.
Record the combined weight 4. Determine the weight of the water by subtracting the empty beaker weight (step 1) from the weight of the beaker plus 50 ml of sea water (step 3) 5. Place beaker on hot plate and evaporate most of the water. Record the time and temperature at which the seawater begins to boil. As the water is being evaporated, record the temperature every 2 minutes.
They work best at room temperature around 36-40 C. Introduction For this experiment, I will be looking at how the change in temperature affects the rate of reaction. If the temperature is too high or too low in the water bath the enzymes active site will denature. The best temperature is 37 degrees because this is the natural body temperature which is also called the optimum temperature so the reaction will take place faster. Method * Firstly you have to label a test tube with the temperature that you will be investigating. * Secondly you have to add five drops of phenolphthalein the test tube which you are using.
Oxygen Consumption and the ventilation rate of the fish are directly proportional to the temperature of the water. The hypothesis of this experiment is that the ventilation rate and oxygen consumption of the fish will be higher in warmer temperature water than in the cold temperature water. Discussion: In our experiment we were able to observe the change in oxygen concentration of water at two different temperatures (15C and 25C) with a fish in each environment. The results supported our hypothesis as it
You should submit your document as a Word (.doc or .docx) or Rich Text Format (.rtf) file for best compatibility. Exercise 1: Data Interpretation Dissolved oxygen is oxygen that is trapped in a fluid, such as water. Since many living organism requires oxygen to survive, it is a necessary component of water systems such as streams, lakes and rivers in order to support aquatic life. The dissolved oxygen is measured in units of ppm (parts per million). Examine the data in Table 4 showing the amount of dissolved oxygen present and the number of fish observed in the body of water the sample was taken from; finally, answer the questions below.
Mohammad Zryab Group Member(s): Javed Alli Aminata Saliu Biology 102 Lab 3/29/12 Ventilation and Oxygen Consumption in Fish Procedure The group was given two goldfish, Carassius auratus, of equal size; however the age and gender were unknown to the group. For each individual fish, a half-full beaker of aerated water was prepared from the aquarium in which it was originally kept. The mass of the beaker was weighed, and a fish was put into each individual beaker and then weighed again, and the difference in weight was calculated as the weight of the fish. Now a 250mL jar of water was prepared for each individual fish, and the fish was transferred from the beakers into the jars. These jars were now placed in an appropriate water bath and were left open to the surrounding environment.
Investigation of Osmosis in Quails’ (Coturnix japonica) Egg Research Question What is the effect of different concentration of sodium hydroxide solution on de-shelled quails’ egg? The concentration of sodium chloride used is 0%, 5%, 10%, 15% and 20%. How does the different concentration of sodium hydroxide solution affect the change of mass of quail’s eggs when the eggs are immersed in each solution and left for more than 24 hours? Variables variables Method of Controlling Independent Concentration of Sodium chloride Solution The concentration of sodium hydroxide solution prepared and used for this experiment is 0%, 5%, 10%, 15% and 20%. Dependent The average change of mass of quails egg The initial mass of each quails’ eggs is weighed and the eggs is weighed again after 24 hours.
In a study done on a Dutch population, a weak inverse relationship is shown between calcium and body mass index, meaning that as calcium dosages were increased, the body mass index decreased slightly (Boon, Koppes, Saris, & Van Mechelen, 2005). Calcium also aids the body with blood clotting (French, 2009). Calcium also helps reduce stress and prevent the absorption of radioactive materials, such as cadmium and lead (French, 2009). Calcium also helps to maintain normal alkalinity levels within the bloodstream by signaling the constriction and relaxation of blood vessels. The maximum activity of proteins and enzymes is also largely due to Calcium because the binding of Calcium ions is necessary for the activation of seven clotting agents in the coagulation cascade.
Experiment one was based on the effect of the copper on survival and growth of the fish which were examined under the semistatic condition with six different copper concentration. It was also based on the natural (control) and the copper-added seawater which were kept for 24hrs before the experiment. This experiment was conducted for fourteen days, the species were weighed and pooled at the start and were individually weighed at the end. The second experiment was obtained from the seven different spawning, It was similar to those in experiment one. However, the concentration of the copper