# Biological Investigation. The Variability of Organisms

Measurement of 160 Lima beans

Facharbeit (Schule) 2008 10 Seiten

## Leseprobe

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

illustration not visible in this excerpt

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

illustration not visible in this excerpt

Table 3: The number of elements and median for each class of mass.

illustration not visible in this excerpt

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

My hypothesis that organism of the same species will differ in length and mass but are more or less quite so similar was correct.The measurements prrove it.Only 1.7cm and 1.25gr is the difference between the smallest and largest bean during this experiment.The beans were very close to each other in length and also in mass but still the differences exist.In general there were no obstructions during this experiment.THe only thing which is worth to be mentioned is that we didnt know if these beans which were brought up were the same and we also had no idea about the enviroment the beans were before. The Investigation was succesfull.

## Details

Seiten
10
Jahr
2008
Dateigröße
1.1 MB
Sprache
Englisch
Katalognummer
v159583
Note
Schlagworte
International Baccalaureate Biology SL Investigation Beans Felix Dyrek