Water flows over the gills and is continuously pumped by the mouth. This movement can be detected and measured thus providing us the ventilation rate. Carbon dioxide produced by the fish diffuses from the blood into the water passing over the gills, removing it from the fish’s body. This counter-current exchange of gases ensures oxygen consumption and carbon dioxide extraction. In a fish, the metabolic rate depends on the temperature of the water.
The number bubbles produced shows the affect of light energy to the rate of photosynthesis. Hypothesis As the distance of the light increase, the bubble produced will also increase. As the distance of the light decrease, the bubble produced will also decrease. The percentage of Sodium bicarbonate in the 200 mL water will affect the rate of oxygen bubbles in the water. Selecting variables Independent variable: • Distance of the lamp (cm) This variable needs to be changed to observe its affect on the rate of photosynthesis.
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. But when the quails’ eggs are immersed into 30% and 45% concentration of sodium chloride solution, the final mass of the quails eggs will decrease. http://www.biologyjunction.com/osmosis_lab_report_sample_4_prea.htm ,visited on 30/8/2012
The guard cells lower their water potential to draw in water from the surrounding epidermal cells, by actively accumulating potassium ions. This requires ATP which, is supplied by the chloroplasts in the guard cell Gills: Fish uses gills as their gas exchange surface. Gills have a large surface area because of the numerous folds within them. The rows of gill filaments have many protrusions called gill lamellae. Water is continuously pumped through the mouth and over the gills.
The fins of a fish help a fish move, steer, and give stability in the water. Because water is 800 times more dense then air, a fish must have very strong muscle behind these fins to move through the water. The last part of the skin that shows evolution is mucus that secretes out. This mucus provides protection from bacteria and viruses. It also acts as a type of lubricant to reduce friction in the water allowing easier movement through the water.
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.
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.
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. [pic] Post-Lab Questions 1. What patterns do you observe based on the information in Table 4? I noticed as the dissolved oxygen (ppm) increases, so does the number of fish observed. The fish reached the peak population at 12 (ppm) of 15 fish, after this peak the fish sharply dropped off and started to rise slowly afterwards.
When exercising the cardiovascular system has different functions during exercise , such as it delivers oxygen to working muscles, oxygenates blood by returning it to the lungs, transports heat from the core to the skin, it delivers nutrients and fuel to active tissues and I also transports hormones . Exercising is known as an increased demand on the cardiovascular system. Oxygen demand by the muscles increases sharply. Metabolic processes speeds up and more waste is created. More nutrients are used and body temperature rises.