This allows students to focus on the process and techniques of investigation and the subsequent reporting. However, in Year 12 students are often given freedom to choose a topic or research question from the work covered over the whole of the course. These "Open Inquiry" EEIs may provide more ownership, engagement and deeper understanding for the students but do place a bigger demand on resources and laboratory management. However, many teachers have found strategies to manage this should they choose to opt for a Open EEIs.
October 30, Cellular Respiration in Mealworms Energy is at the heart of life. Without energy, cells could not grow, transport materials, or maintain order.
In most organisms, this steady source of energy is provided by ATP or adenosine triphosphate, a molecule that consists of a nucleotide with three attached phosphate groups. Cells produce ATP through a process known as cellular respiration.
In this process, free energy is transferred from food molecules such as glucose into ATP molecules as glucose is gradually oxidized, releasing energy that is eventually used to attach inorganic phosphate groups to ADP molecules to produce ATP. Cellular respiration consists of substrate-level phosphorylation during glycolysis and Krebs cycle, which occur in the cytoplasm and mitochondrial matrix respectively, and the much more energy-rich oxidative phosphorylation during the electron transport chain, occurring in the mitochondrial inner membrane.
Despite its complexity, cellular respiration can be summarized by the following simple chemical equation: Specifically, we decided to use a carbon dioxide probe to measure the rate at which two mealworms in a closed jar produce carbon dioxide. Since carbon dioxide is produced as a byproduct of cellular respiration, the change in carbon dioxide concentration over time can be used to measure the rate of cellular respiration of the mealworms.
We also decided to study the factors affecting the rate of respiration by asking, what effect, if any, does sound have on the change in CO2 concentrations in the jar with the two mealworms? We initially hypothesized that sound would increase the rate of respiration because higher sounds are likely to cause the mealworms to move around more, increasing the need for energy.
To begin testing our hypotheses, we took two mealworms and placed them in a large jar. We sealed the jar by inserting a Vernier carbon dioxide probe into the top opening.
We then connected the probe to the Vernier Graphical app. For the control case, we then let the jar sit for ten minutes, using Vernier Graphical to measure the carbon dioxide concentration in parts per minute over the ten minute duration. Next, for the experimental cases, we again took the jar and placed two new, but identically sized mealworms we had to air out the first two and repeated the process of measuring carbon dioxide concentration over ten minutes.
But this time, we used another app to generate a high pitch noise, above the frequency that humans can hear, for the entire ten minutes, keeping the iPad close to the jar. Finally, we repeated the same procedure with two new, identically sized mealworms but played a low pitch noise within the human audible range for the entire ten minutes.
Pictures of the experimental setup — two mealworms in a jar with carbon dioxide probe. Graph showing carbon dioxide concentration ppm vs time for all three cases. Red — low pitch.
Yellow — high pitch. In this graph, the blue line is the data from the control case, the red line is the low pitch trial, and the yellow line is the high pitch trial. From the graph, we can see that, in the control case, the carbon dioxide concentration increased from ppm to ppm, an increase of ppm.
For low pitch, the change in carbon dioxide concentration over the same interval was an increase by ppm, and finally for high pitch, the change in carbon dioxide was an increase of ppm.
The data clearly shows that the increase in carbon dioxide concentration was greatest in the high pitch case and lowest in the control case.
This means that cellular respiration is occurring at a faster rate in the low pitch case and at the fastest rate in the high pitch case, since more carbon dioxide production means more moles of glucose are oxidized per unit time.
Thus the data supports our hypothesis that sound increases the rate of cellular respiration by making the mealworms move around more because of discomfort. It also makes sense that high pitch sounds increased cellular respiration more than low pitch sounds since high pitch sounds are more unpleasant than low pitch ones, leading to more motion as a result.
We also successfully determined the effect of at least one factor, sound, on the rate of cellular respiration. Some sources of error in this experiment, however, may include the fact that we used different mealworms in each trial, although we controlled for biomass by using identically sized mealworms each time.
For future research, we would definitely like to measure the impact of other factors, such as temperature or time of day, on cellular respiration using a similar method, and repeat the experiment on bigger, more complex organisms as well.
However, the biggest goal would be to actually measure the rate of cellular respiration in terms of moles of glucose oxidized per second.
Finally by converting back into moles and using stoichiometry, we could get moles of glucose.Vegetarianism / v ɛ dʒ ɪ ˈ t ɛər i ə n ɪ z əm / is the practice of abstaining from the consumption of meat (red meat, poultry, seafood, and the flesh of any other animal), and may also include abstention from by-products of animal slaughter..
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Experiments; References; PDF Files. Learning Through Experiments. Experiment 1 – Natural Wheat Bran vs. Oat Bran We could only do the count with 5 mealworms because the other 5 mealworms are in the pupa stage of their life cycle.
It was also noted that the apple on the OB side of the box was not eaten, whereas the one on the NWB . You are encouraged to refer to this document each time you write a lab report.
The writing of laboratory reports is an essential part of any practical module in Psychology. May 01, · Styrofoam is an ever-present waste material in modern society, being used to package everything from food to futons.
It’s also not the easiest thing to deal with as a waste stream, either. Mealworm lab report!The Dairy image gallery contains images of current and future developments and innovations in introduction to educational research a. Study reveals how a species of mealworm can consume and also digest this plastic-like material.
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Report of pesticide Hotspots in Bangladesh. Chemical stimuli from .