• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month
Page
  1. 1
    1
  2. 2
    2
  3. 3
    3
  4. 4
    4
  5. 5
    5
  6. 6
    6
  7. 7
    7
  8. 8
    8
  9. 9
    9
  10. 10
    10
  11. 11
    11
  12. 12
    12
  13. 13
    13
  14. 14
    14

In this experiment, mung bean seedlings and Brine shrimp eggs were used to study the effect of temperature on the rate of germination of seedlings and the rate of hatching of eggs.

Extracts from this document...

Introduction

Title : Investigation on the effect of temperature on the development of organisms Abstract : The purpose of carrying out this experiment is to investigate the effect of different temperature on the development of organisms. The effect of increasing temperature on the development of living organisms can be modeled in the laboratory by measuring the germination of plants seedlings and the hatching rate of living organisms. This experiment is to show the effect of rising temperature on the earth or in other words, global warming on the living organisms. It is also to show which temperature is the most suitable for living organisms to live in. Temperature plays an important role on the enzyme activity which in turn affects the whole organism. In different salinity, living organisms also will have a different rate of development. In this experiment, mung bean seedlings and Brine shrimp eggs were used to study the effect of temperature on the rate of germination of seedlings and the rate of hatching of eggs. Three different temperatures that is 20oC, room temperature of 25oC and 30oC were used to investigate the effect of temperature on the development of both mung bean seedlings and Brine shrimp eggs while 1% and 1.5% salt solution were used for the Brine shrimp eggs. The number of seeds germinated, length of the radicles and the number of leaves were measured to determine the rate of development of mung bean seedlings. On the other hand, the number of eggs hatched, number of shrimps alive and mobility of shrimps were observed in order to examine the development of organisms. In conclusion, the optimum temperature for the development of organisms will be the room temperature that is around 25oC and the optimum salinity for the development of Brine shrimp is at 1.5% salt solution. Problem statement: Does global warming affect the rate of development of organisms? What is the effect of increased temperature on the rate of development of organisms? ...read more.

Middle

4.77 0 3 4 3 2 4.40 Mobility of shrimps No Yes Yes Table 3 : The hatching rate of Brine shrimp at room temperature of 25oC in 1% salt solution Time (hours) 24 48 72 Samples 1 2 3 4 5 M (%) 1 2 3 4 5 M (%) 1 2 3 4 5 M (%) No of eggs observed 28 35 98 42 47 - 25 32 78 50 35 - 35 60 23 40 32 - No of eggs hatched 3 7 5 12 8 16.3 5 9 7 13 9 21.8 5 10 12 8 9 26.3 No of shrimps alive 2 4 3 9 9 12.4 3 2 5 10 9 14.1 4 9 11 6 7 22.2 Mobility of shrimps Yes Yes Yes Table 4 : The hatching rate of Brine shrimp at 30oC in 1% salt solution Time (hours) 24 48 72 Samples 1 2 3 4 5 M (%) 1 2 3 4 5 M (%) 1 2 3 4 5 M (%) No of eggs observed 25 33 72 40 26 - 22 45 81 20 18 - 31 40 25 42 48 - No of eggs hatched 4 11 6 12 6 22.1 7 5 10 5 7 23.8 8 7 10 11 8 25.2 No of shrimps alive 3 5 4 10 3 13.8 4 3 5 2 3 11.5 3 1 0 3 1 4.28 Mobility of shrimps Yes No No Table 5 : The hatching rate of Brine shrimp at 25oC in 1.5% salt solution Time (hours) 24 48 72 Samples 1 2 3 4 5 M (%) 1 2 3 4 5 M (%) 1 2 3 4 5 M (%) No of eggs observed 32 51 79 98 25 - 59 28 32 21 56 - 35 41 58 34 24 - No of eggs hatched 9 13 8 5 5 17.8 11 10 6 5 8 22.2 13 8 11 4 12 27.5 No of shrimps alive ...read more.

Conclusion

There might be contamination and affects the result of this experiment. Furthermore, if the beakers containing the Brine shrimp eggs are not stirred properly, this will reduce the accuracy of the experiment as some of the eggs will not have enough water to hatch. Not only that, human error can also result when the numbers of eggs are counted wrongly when observe under the compound microscope. Risk Assessment / Precautions Firstly, utmost care has to be taken care when handling glass wares such as beakers, glass rods and Petri dishes as they are fragile and can be broken easily. We should wash our hands with soap before and after the experiment to take care our personal hygiene. Be extra careful when dealing with sharp apparatus such as the forceps and scissors when cutting the cotton wool and transferring the seedlings into the Petri dish. Furthermore, do make sure that the amount of Brine shrimp eggs that are placed into each beaker is almost the same by using two half teaspoon instead of one full teaspoon which might reduce the accuracy of the number of eggs in each beaker. When measuring the eggs, care needs to be taken as not to destroy the eggs. Do not stir the eggs too hard as the eggs might be destroyed while stirring. Suggestion and Improvements First and foremost, aseptic techniques can be carried out during the preparation of the mung bean seedlings so that the results of the experiment can be improved. Besides that, make sure that the cotton wool is wet thoroughly as this will ensure that the mung beans wil have enough water to germinate. Conclusion : Global warming does affect the rate of development of organisms. As the temperature increases, the rate of development of living organism increases until the optimum temperature that is room temperature of 25oC. Beyond the optimum temperature, the rate of development decreases with further increased in temperature. The rate of development of organism increases with higher salinity of solution until the optimum salinity of not more than 3%. The hypothesis is accepted. ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our GCSE Living Things in their Environment section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Here's what a teacher thought of this essay

4 star(s)

****
A great deal of work has gone into this study. It is a pity that more than one independent variable is involved. More detail is needed in many places, and more complete explanations would allow a better understanding of reasons for decisions made about the experimental method.

Marked by teacher Adam Roberts 30/07/2013

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related GCSE Living Things in their Environment essays

  1. Marked by a teacher

    The effects of disinfectants and antibacterial soap on bacterial growth

    5 star(s)

    On the other hand, control #1 had undergone a considerable increase in bacterial growth, and the entire dish was literally overrun with circular and puntiform colonies of yellow and white bacteria. There was no bacterial growth was detected on the regrowth plate inoculated from the BactiStat, Coverage, Lysol, and Enviroquat

  2. Marked by a teacher

    Taxonomy is the branch of biology that deals with the identification and naming of ...

    5 star(s)

    In biology the system is "binomial", meaning that two names are used to specifically identify every organism - genus and species. The binomial system uses a two word Latin name. For example, the binomial name for humans is Homo sapiens.

  1. Marked by a teacher

    A2 Biology Coursework -Investigation into the effect of different concentrations of antibiotics on the ...

    4 star(s)

    And then use a separate syringe to transfer the stated amount of antibiotic volume in the table above into these test tubes. 19. Replace the cork and shake. 20. Label the Petri dishes with percentage concentration starting from highest to lowest.

  2. Marked by a teacher

    An Investigation into a Woodlice's Preferred Choice of Environment.

    3 star(s)

    10 will be placed in a dry container, 10 in a wet container and 10 in the conditions in which the woodlice were living prior to the experiment. By doing this I will interpret the movements given by the different groups once placed in the choice chamber.

  1. The importance uses of micro organisms.

    Various bacteria are involved in a chemical process called fermentation used to make alcohol beverages. Sewage treatment plants use bacteria to purify the water. They can also be used to make certain drugs such as human insulin. Bacteria are of major importance in helping with research.

  2. 'Bacteria. Friend or Foe?' Bacteria is something we are all reminded of ...

    It has been found to help people suffering from illnesses where their muscles involuntarily contract by disrupting the vesicles ability to attach to the cell membrane (12) and has been used by those suffering from conditions such as blepharospasm. Even the most toxic bacteria known to man seems to have

  1. Describe the differences between natural ecosystems and ...

    Hence, in agro-ecosystems the remaining soil fauna, microorganisms, and any surviving weeds provide the only species diversity. For example in the U.K a wheat crop will only support the insects or animals (i.e. field mouse) that feed on wheat, and any species that can then feed on these primary consumers.

  2. Aseptic Technique.

    Label the Petri dish 5. Put 1cm3 of each sample into separate Petri dishes. Use the same pipette for each sample. Don't leave the lid off the Petri dish for too long as other bacteria may contaminate the water sample in the Petri dish.

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work