In experiment one, involving the rate of respiration of germinated peas when exposed to a variety of different temperatures. From a general standpoint the data collected matched the hypothesis formed, as the temperature increases the rate of respiration will increase as well. This was shown as the average ppm of oxygen was taken from each group. Comparing the data from the class is shows the effect of human error on the results. For example group #4 seemed to have back wards results this may have been due to an improper seal on the oxygen sensor.…
A small population of finches have been discovered on Darwin and Wallace Island. The population is 200 finches at Darwin Island, and 200 finches at Wallace Island. The year is 1997, and scientist measured the finch beak size from both Darwin and Wallace Island. The finches from both island, showed an average beak size of 12.0 mm. Precipitation on both Darwin and Wallace island average 20.0 cm. Scientists want to determine if precipitation was to increase, would the finch beak increase in size? In this lab study, scientist will be measuring the amount of precipitation within the discovery of the finch on Darwin and Wallace island, and collect data to prove that the finches evolved a larger beak due to the increase of rainfall.…
The aim of this experiment was to find the favoured temperature for types of micro-organisms to grow. The hypothesis was sort of rejected in this experiment as our rule of thumb didn’t add up to the results we got. If we could make our results more accurate, we could have supported our hypothesis but as the results were inaccurate, we could not prove that our hypothesis was correct. Overall this experiment went well even though there were some difficulties and problems that occurred which altered our…
Conclusion: Reject the null hypothesis, since the observed significance (p-value) is less than the significance level 0.05. The sample provides enough evidence to support the claim that there is significant difference in the proportions of red and brown candies.…
A controlled experiment is one in which all the variables except one are held constant. The single variable that is manipulated (the independent variable) is done so in a controlled way, in order to observe and measure the effects on the dependent variable. In this experiment, the rate of chirping increased with temperature. The other variables (wind speed, number of crickets, humidity and atmospheric pressure) did not impact the number of cricket chirps. The rate stayed at 148 beats per minute in these tests. We met our purpose, but our hypothesis was not supported. We needed at least six data points in order to make a reasonable conclusion. If you only pick larger values, you don’t have information about what happens on the other side you need to support your conclusion.…
The purpose of this experiment is to design and conduct a basic scientific experiment, identify and control variables. Some other objectives that we learned is to write a formal hypothesis, identify the basic and integrated process skills of science that were used in this experiment. Also, we will learned the effects of temperature on goldfish respiration. This experiment will be conducted with four students , one goldfish, thermometer, a stop watch, and a beaker. Our results showed that the fish temperature increased and the fish breathing slowed down.…
Planaria are free-swimming mostly freshwater flatworms. Flatworms are very unique creatures because they regenerate lost parts. My groups experiment was, The Effect of Darker Regions on Planaria Movement. The purpose of this experiment was to see whether or not the planaria preferred the white region or the dark region. My hypothesis was, If the Planaria are placed on the white side then they will move to the dark side because the planaria have a strong negative geo-tropism and would move away from white side and go to the dark side. The independent variable was the two sides of the petri dish, which had one white region and one dark region. The dependent variable consisted of how many…
The possible results of the experiment that would not reject the null hypothesis is that there is no correlation between the size or the proximity of the object and the intensity or size of the blue rings on the Hapalochlaena lunulata. For example, each H. lunulata will differ in their response- they will not present their rings or they will present their rings immediately and not differ when the object is bigger or closer. The possible results of the experiment that would lead to rejecting the null hypothesis is that there would be a correlation between the size and correlation between the size of the object or the proximity of the object and the intensity or size of the blue rings on the Hapalochlaena lunulata. For example, the size and intensity of the blue rings would increase as the object got bigger and as the object got closer as a warning and defense mechanism before it attacks or…
At temperatures below 15°C the gill lamellae of goldfish are largely covered by an interlamaller cell mass which decreases the functional surface area of the gill. The presence of the ILCM in goldfish acclimated to cold water conceivable could lead to a covering of the neuroepithelial cells (Tzaneva, Perry 2010). The respiration rate can be determined by how many times the mouth opens and closes. The main purpose of this experiment was to test the breathing rates of a goldfish in room temperature water, and the breathing rates of a goldfish in ice water. Does temperature affect the goldfish’s breathing rate? The independent variable in the experiment was the thing we manipulated most, which was the temperature, and the dependent variable was the breathing rate because it changed due to the temperature. The null hypothesis is the temperature does not affect the breathing rate. The alternative…
In this lab we used a solution of lactase to test the chemical and physiological properties of this particular enzyme and determined whether the lactase came from human cells or bacterial cells. In the statistical analysis statistical formulas and techniques are used to analyze the significance of a set of data and the validity of the conclusions made based on that data. These are some terms and definitions that will be crucial to understanding the validity of this experiment. An enzyme is a protein that acts as a catalyst to lower the activation energy required for reactions to progress in the cells. Null hypothesis states that there will be no difference between the result of two separate variables A and B. The null hypothesis states in regards to the enzyme experiment that lactase will not bind preferentially, or more specifically, to maltose or lactose. Before a null hypothesis can be rejected we must notice a large difference between glucose produced from maltose versus lactose. Alternate Hypothesis states the opposite of null in that there will be differences between the results of A and B. Probability is an indication of likelihood very similar to a percent chance. All probabilities are between 0 and 1, with probability zero indicating an event is impossible and one indicating an event is certain to occur. T-value or t-Test is what is used to determine whether or not the null hypothesis is valid. This t-value can be used to create a p value which in turn will determine whether the results are statistically significant or not. Based on what I know about the effect of temperature on the enzymatic activity of lactase, I hypothesize that higher temperatures will cause denaturing in the enzyme causing it to be less effective and lower temperatures will more conducive to enzymatic activity, and a higher pH will be more conducive to enzymatic activity.…
If I cross a female apterous fly with a male wild fly, what would the offspring look like?…
Sexual selection is one of the defining characteristics of any given species. Female organisms select their mates based on a multitude of different factors based on their species, including size, color, displays of power, and mating or calling sounds. The process of mate selection is very important for organisms because through it they are trying to ensure the best levels of fitness for their future offspring. Mate selection can be divided into two arenas: preference functions, the varying significance of different male characteristics, and choosiness, the lengths a female will go to in time and energy to find and select a mate (Judge, Ting, & Gwynne, 2014). In most species, the males perform displays of power or aggression, making calling sounds, or have attractive colors or other physical characteristics in order to attract female mates. One of the key factors in sexual selection for crickets is the calling song which is…
Since SPSS reports the P-value on the basis of a two-tailed test. Hence the one-tailed P-value is 0.000/2 = 0.000 < .05 Reject the null hypothesis because p value is less than the significance level. The sample supports the alternative hypothesis that Mean heat rate is greater than10000 kJ/kWh.…
Three Mediterranean Field crickets were used in this experiment they were kept in separate enclosures all maintained at room temperature (20°C - 25°C). One male cricket was kept in a glass container alone, the other male cricket was kept in a clear plastic…
In our investigation, the team will hope to convince the audience of the hypothesis chosen by the team through introducing our statement regarding the research issue, performing the five step hypothesis testing procedure on the data, explain the nonparametric test the team chose to analyze the data and why we chose this particular test. We will then interpret the results of the test; explain the differences that were observed from the teams week three paper. We have also included the raw data tables and results of this weeks test in Appendix A-D. The key is using the right data at the beginning to make the difference in how the test results will turn out.…