Determine the Experimental Design from a Graph Here\'s a close up of the graph P

Question

Determine the Experimental Design from a Graph

Here's a close up of the graph
Please explain to me on how you got your answers Part 3-Data Analysis (15 points Adapted from: Pechenik, J.A, and Tashiro, J. S., 1992. The graphing detective: an exercise in critical reading, experimental design & data analysis. The American Biology Teacher 54(7): 432-435 Determine the Experimental Design from a Graph one of the most important skills you will develop as a student is the ability to analyze figures and tables to extract the important information that they contain. This exercise is designed to help you begin to develop this skill. The organisms used in the study are diatoms, single-celled algae that inhabit both marine and fresh water environments. They range in size from 50-500um. Diatoms are photoautotrophs, that is, they are able to harness the energy of the sun to make their own food using photosynthesis. And, like the other photoautotrophs (land plants!) you are more familiar with, diatoms respond to the addition of fertilizer by growing more

Explanation / Answer

To perform any experimental set up need to have certain measures and standard environment. Here the experimental measures are done with the Phytoplankton species where we are to determine and manipulate the graphical expression of the data.

From the graph and its length and width we can make out the specificities about the experiment and its clear attentive engagement with the outcome. Now going to the problems to analyze each one of them and explaining it to be clear and precise.

1. Looking at the graph and its X and Y axis we know that this experiment is done to see the photosynthetic rate of oxygen production by the addition of phosphate in a phytoplankton species. Here the X axis represents the Hours of illumination, that suggest the phytoplankton species were in a lab set up, the exposure time of light on them was determined by the external lights in hours. Also the Y axis is representing the evolved Oxygen amount, so the addition of phosphate into the species have shown significant illumination to watch over them by the addition of light stimuli.

2. A standard is always has to be there to set the bar from where we start to search for our calculation. This study was done under observation and strict measurements, the data seta shows the parameters and their amounts. The photosynthetic oxygen evolve rate differs in species to species respect the sunlight. Here the artificial light was provided to keep them under certain amount of time. One important thing here to observe is the use of a control species, that in the graph shown as No addition, so we can draw line from here to differentiate the non-affected species with the experienced, phosphorous addition species.

3. We cannot tell about the light exposure type, weather the experiment was done under he continuous flow or not, because here the hours of exposure from a 500 Wt bulb is given is constant with the water bath treatment of 15 degree C or not. In an experiment we need to have timeline, same set of species and the duration standardized. Having the current graph we cannot determine all other parameters, also if the standard values are given with statistics, we need to have at least 3 sets of it, so the credibility we cannot determine. We need to have also the background data and reviewed information.

4. The objective question would be what is the effect of long-term exposure and oxygen production rate on Phytoplankton species?

5. We have to know certain objective of the study to determine the end results those are hypothesized, we need to ask the previous question to have a clear idea about the physiological photosynthetic role of phytoplankton’s, as they are used in laboratory experiments as model organisms. These critical information are thus very necessary to ask.

6. Most important thing is the oxygen evolution rate depending on the exposure time, this suggests in nature what benefits they are providing us. When they are given optimum conditions, what are the most functional form, by finding that out would help us to grow them naturally to get much of the oxygen in turn?

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