This bean topic was done in order to show that a species differ in size and mass from even when it developed in the same environment.
Biological Investigation: The Variability of Organisms
Introduction:
This bean topic was done in order to show that a species differ in size and mass from even when it developed in the same environment.
Research Question
Which differences does exist in an organism of the same group ?
Hypothesis
If a large number of Lima beans will be meassured in lengh and mass than there will be a small vary up to no vary at all while some will differ much more from the average bean.
Hypothesis Explanation
An organism of a species and the genus wont look exactly the same as another one in nature.When we clone it than but only than its possible.The organism will always differ,even if the differences are small,from another one.
Compounds
160 Lima beans
Variables
length of beans (dependent) mass of beans (dependent)
Apparatus
1 electronic scale
1 ruler
pencil & paper to record data
Method
Turn on the electronic scale.
Weigh each of the beans and write down the datas Measure the length of the beans and note each value
Data Collection & Processing
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Table 1: The values of the length and mass of each bean, unsorted and sorted.
The Classes for each variable:
Classes of length.
In order to establish classes for the data:
Take the lowest value and the greatest value, 1.2 cm and 2.9 cm Find the difference of these values.
Divide this result by 8 (the amount of classes that are needed)
Now, with this value, you should add it starting with the lowest value of length, 1.2, and continue until you have reached the highest value, 2.9. You will have 8 total classes.
1st class: 1.2 + 0.2125 = 1.4125, 1.2 - 1.4125
2nd class: 1.4125 + 0.2125 = 1.625, > 1.4125 - 1.625
3rd class: 1.625 + 0.2125 = 1.8375, > 1.625 - 1.8375
4th class: 1.8375 + 0.2125 = 2.05, > 1.8375 - 2.05
5th class: 2.05 + 0.2125 = 2.2625, > 2.05 - 2.2625
6th class: 2.2625 + 0.2125 = 2.475, > 2.2625 - 2.475
7th class: 2.475 + 0.2125 = 2.6875, > 2.475 - 2.6875
8th class: 2.6875 + 0.2125 = 2.9, > 2.6875 - 2.9
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Table 2: The number of elements and median for each class of length.
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Graph 1: representing the relation between the number of elements and each class of length.
Standard deviation of the values of length: 0.22
This was calculated by using Excel.
Classes of mass.
Use the same method that was used for classes of length:
Take the lowest value and the greatest value, 1.07g and 2.32g. Find the difference of these values.
Divide this result by 8 (the amount of classes that are needed)
Now, with this value, you should add it starting with the lowest value of length, 1.07, and continue until you have reached the highest value, 2.32. You will have 8 total classes.
1st class: 1.07 + 0.15625 = 1.22625, 1.07 - 1.22625
2nd class: 1.22625 + 0.15625 = 1.3825, >1.22625 - 1.3825
3rd class: 1.3825 + 0.15625 = 1.53875, >1.3825 - 1.53875
4th class: 1.53875 + 0.15625 = 1.695, >1.53875 - 1.695
5th class: 1.695 + 0.15625 = 1.85125, >1.695 - 1.85125
6th class: 1.85125 + 0.15625 = 2.0075, >1.85125 - 2.0075
7th class: 2.0075 + 0.15625 = 2.16375, >2.0075 - 2.16375
8th class: 2.16375 + 0.15625 = 2.32, >2.16375 - 2.32
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Table 3: The number of elements and median for each class of mass.
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Graph 2: representing the relation between the number of elements and each class of mass.
Standard deviation of the values of mass: 0.3
This was calculated by using Excel.
Conclusion and Evaluation
Frequently asked questions
What is the main topic of the biological investigation?
The biological investigation focuses on the variability of organisms, specifically using Lima beans to demonstrate that even within the same species, there are differences in size and mass even when developed in the same environment.
What is the research question driving the investigation?
The research question is: Which differences exist in an organism of the same group?
What is the hypothesis being tested?
The hypothesis is that if a large number of Lima beans are measured in length and mass, there will be a small variance, with some beans differing more from the average than others.
What is the explanation of the hypothesis?
The explanation is that organisms of the same species and genus will not look exactly the same in nature. Cloning is the only way to potentially achieve exact similarity. Organisms will always differ, even if the differences are small.
What compounds were used in the experiment?
160 Lima beans were used.
What variables were measured?
The length and mass of the beans were the dependent variables.
What apparatus was used in the experiment?
An electronic scale, a ruler, and pencil & paper for recording data were used.
How was the data collected?
Each bean was weighed using the electronic scale, and its length was measured using the ruler. The data was recorded on paper.
How were the classes for length and mass established?
For both length and mass, the lowest and highest values were identified. The difference between these values was divided by 8 (the desired number of classes). This result was then added to the lowest value successively to create the class boundaries.
What was the range of lengths observed in the beans?
The lengths ranged from 1.2 cm to 2.9 cm.
What was the range of masses observed in the beans?
The masses ranged from 1.07g to 2.32g.
What was the standard deviation of the length values?
The standard deviation of the length values was 0.22.
What was the standard deviation of the mass values?
The standard deviation of the mass values was 0.3.
What was the conclusion of the investigation?
The conclusion was that the hypothesis was correct. Organisms of the same species differ in length and mass, but are relatively similar. The measurements proved this, with only a 1.7cm and 1.25gr difference between the smallest and largest beans.
What potential sources of error were identified?
A potential source of error was the unknown origin and previous environment of the beans.
Was the investigation deemed successful?
Yes, the investigation was considered successful.
- Citar trabajo
- Felix Dyrek (Autor), 2008, Biological Investigation. The Variability of Organisms, Múnich, GRIN Verlag, https://www.grin.com/document/159583
