1) Introduction: Very little is known about the purpose of fruit flies. In South Africa, the fruit fly is an invasive species that cause a lot of damage to host plants. By understanding the environmental conditions that affect the fruit fly, we can start to understand why this creature is on the planet as every organisms plays an important role in the “Circle of life”. 2) Research We know that female fruit flies are able to reproduce at an alarming rate- laying as many as 100 eggs per day! And we also know that fruits flies are influenced by groups of other fruit flies as to where they lay their eggs (as confirmed in an experiment by Marine Battesti of the Université Paris-Sud in France). We also know that fruit flies are very attracted to damp, normally dark places such as fruit bowls or rubbish bins. If we compare the environmental conditions in which we expose the fruit flies- would we be able …show more content…
Over the first three days, both containers had no flies present- but the results started differentiating after that. On day 4, the organic container started collecting flies. The number of flies on the organic banana started rising at an exponential rate from day four, whereas the number of flies on the inorganic banana was minute in comparison. The inorganic banana only started collecting flies on day six. On day 7 the inorganic banana had the same number of flies as the organic banana did on day 5- this type of occurrence also happened on days 6; 9; 10; 7; 12; 8; 13 and 14. Looking at the inorganic banana, on day 9 and 10 the numbers remained constant- which did not happen with the organic banana. This also happens between day 13 and 14 with the inorganic banana. If we compare the results halfway through the experiment, we see that the organic banana had 240% more fruit flies than that of the inorganic banana. At the end of the experiment, the organic banana had 207% more flies than the inorganic
Calculation: Initial Mass(g)-Final Mass (g)=Change in Mass (g) Trial 1 74.5-62.0=12.5(g) Trial 2 272.7-271.5=1.2(g) Percent Error: 272.7-271.5 x 100 272.7 =0.440% Percent Change: 74.5-62.0 x 100 74.5 (Trial 1) =16.778% 272.7-271.5 x 100 272.7 (Trial 2) =0.440%
We placed three female bean beetles and two male bean beetles in each petri dish. We had a total of three petri dishes, one for each trial. The petri dishes were then placed in constant light under the same conditions for a week. After one week, the data was then collected by counting the number of eggs on each bean by using a light microscope and this number was then recorded and compared to each bean
To test the hypothesis the impact of temperature on milkweed bugs, they will be placed in three different temperature conditions. The temperatures include: 10°C (refrigerated), room temperature 22°C and at 28°C. These various temperatures represent the lowered temperatures from the milkweed bugs optimal temperature (28°C). The day and light cycle for these conditions will be 16L:8D. To test the hypothesis of the effect of light regime on development, milkweed bugs were placed in 22°C condition with a 16L:8D cycle and 22°C condition with a 2.5L:21.5D cycle. About 35 milkweed bug eggs will be placed in a clear container for each treatment group.
If I had a chance to do any of these experiments again, I would choose to go more into depth for the dampness experiment. I would hold the experiment for a longer time period so that I can prove that if the mealworms were allowed to remain on the damp surface for excessive amount of time, the amount of dampness would become harmful to the mealworms as their bodies might start to rot and get infected. If I were to do the food experiment again, I would worms in the soil before putting the food into the container. I would do this because when I gave the worms a thin slice of apple (not part of experiment), they all came up to the surface of the soil to eat the apple. I could tell that the worms ate the apple because on the next day, only the skin
Due to this the research hypothesis was supported. After further calculations if a person wanted to collect 64 pill bugs all he/she needs to do is spray this mixture of sugar around his house and everywhere in his backyard. Two chi-square tests were performed on the data to determine if the
Through concise analysis of research papers and other experiments conducted elsewhere, the final conclusion of this lab was supported. All in all, the inquiry experiment allowed the accomplishment of the goal of identifying one of the main reasons why fruit flies eat rotten fruit. Introduction: Drosophila (a model research organism) melanogaster (black abdomen) is the common fruitfly. The lab required the usage of fruit flies as they are a commonly used organism in many experiments. The portion before the inquiry lab utilized the usage of different foods to determine exactly which food the flies would experience more of an attraction towards.
Therefore, the fitness of the two Drosophila melanogaster phenotypes (sitters and rovers) under two different settings (one with light and one without light) was tested. We hypothesized that the availability of light will affect the survival rate of the Drosophila melanogaster for percent pupation. Materials/Methods: We set up 2 treatment groups, Light and Dark, within this experiment. Each treatment group consisted of the 20 Drosophila melanogaster larvae (10 rovers and 10 sitters), initially placed in the center. Each group
Additionally, it was difficult obtaining a piece of rhubarb that was thin and particularly red, therefore the effect could not be best observed in the cells. Part B: Design your own experiment Parts of this practical were taken and slightly altered from the following link http://www.markedbyteachers.com/gcse/science/investigate-the-effect-of-surface-area-on-osmosis-in-potato-tissue.html Aim: To observe the effect different surface area: volume ratios have on osmosis in potato tissue. Hypothesis: If the potato has a larger surface area: volume ratio, the quicker osmosis will take place and the larger the mass will be at the end of the experiment, therefore the difference in mass of the potatoes from the start of the experiment to the end of the experiment will be larger. Additionally, the potato pieces left in a saltwater solution will decrease in mass, whereas the pieces left in water will increase in mass.
In this lab there were five different stations. For the first station we had to determine an unknown mass and the percent difference. To find the unknown mass we set up the equation Fleft*dleft = Fright*dright. We then substituted in the values (26.05 N * 41cm = 34cm * x N) and solved for Fright to get (320.5g). To determine the percent difference we used the formula Abs[((Value 1 - Value 2) / average of 1 & 2) * 100], substituted the values (Abs[((320.5 - 315.8) /
We then obsevered the two slides for number of cells as well as for food vacuoles inside a cell using a microscope at times of 0,5,10,20, and 30 minutes. Results The following graphs show the results of this experiment. The tetrahymena sample that was introduced to concentrated tobacco had a lower cell/vacuole ratio than the tetrahymena sample that was not exposed to
3. In this experiment, the percent yield was 90%. This number implies that there was little error in this experiment. However, this result could have been caused by certain external factors.
The actual data is the result on our experiment vs theoretical, which is based on the calculations above. I have also learned to pay more attention to draining out all of the product completely before continuing to test the experiment, as any small drop of contaminant can veer our results into a different
Methanol, has a molecule containing CH3OH it being the smallest, ethanol having more carbons and hydrogens than Methanol comes second, CH3CH2OH, and propanol, CH3CH2CH2OH, is the largest of the three molecules. Aim: The aim of this experiment is to see the effects of different alcohols and concentrations on the biological membrane of the beetroot. Research Question: How do different alcohols and concentrations affect the biological membrane of a beetroot? Hypothesis: As the alcohols increase in toxicity and concentration, the damaging and breaking down of the membrane will increase leading to more red pigment being released into the solution causing the absorption of the solute to increase.
Two of the same types of plants were used, in order for the results to be reliable. One of the plants was labelled DISTILLED whereas the other was ACIDIC, so the results don’t get mixed. The DISTILLED plant was used as a controlled variable, where normal spring water was used (pH 7.3) The ACIDIC plant was the one the experiment had taken place on, this was where lemon water was used (pH 2.0) Throughout the experiment pictures were taken, so one will be able to notice the colour change on the acidic plants, as it had started to slowly die. With both plants you are able to notice that they had both started to grow flowers, but more the spring watered plant than that on the lemon juice watered one. The results of the plant growth was recorded to we would be able to notice the amount it had grown, this would be the water compared to lemon juice.
The experiment shall use several concentrations of sucrose solution and a substance known as Methylene blue. A piece of potato/ carrot shall be placed in a boiling tube and the solution shall be poured into it. This tube shall have Methylene blue added into it. After incubation some of this solution shall be taken out with a pipette and inserted into a separate boiling tube containing the same sucrose solution however this solution shall be known as the pre-incubated solution. The drop shall be watched so as to see if the density of the water and concentration of sucrose has increased or not, displaying the water