• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

Germination lab experiment

Extracts from this document...

Introduction

Table of Contents Introduction 3 Research question 3 Hypothesis 4 Materials: 4 Variables: 4 Methods: 4 End result 5 Materials: 5 Variables: 5 Methods 5 Picture proof of experiment 6 Results - Table 7 Graph 7 Discussion: 7 Conclusion: 7 Evaluation: 8 Follow up experiment: 8 Bibliography 8 Introduction In this experiment we will be focusing on the factors, which influence the process of germination of a plant. Germination is the process when a seed sprouts from dormancy. The seeds are placed in soil or in any type of wet paper towel. It is basically the development of a seedling to a seed. The optimal germination pH is between 6 and 7.5. The cotyledons store food for the baby plant inside the seed. There are a few basic steps, which take place during germination 1. The seed absorbs water until it swells and smoothens its exterior wrinkles. 2. The seed then swells until the coat of the seed is ready to burst open. 3. The food, which was stored in the cotyledons or endosperm, soaks up water and the substances dissolved in it. 4. The enzymes then absorb the stored food and respiration begins. Energy and raw materials are gained through food for cell division and growth. 5. Then the radical appears, after which the pumule appears. 6. The seedlings then gain fresh weight through absorbing more water and thus lose dry weight. This continues until enough leaves get matured to produce through photosynthesis faster than it is used for growth. ...read more.

Middle

However there were a few things I changed but the concept and the focus on the factor of salinity remained the same. My aim and hypothesis is the same however a few of the materials have changed since some things were not available to me so I replaced them with other things. Materials: * Distilled water * Table salt * Measuring cup * Teaspoon * Small cup (for salt) * Plastic cup or bottles * 4 Petri dishes or bowls * 40 Mung beans * Tweezers Variables: Controlled variables: temperature, number of mung beans, amount of outside water or solution, sunlight, oxygen. Dependent variables: rate of germination Independent variables: The amount of salt concentration Methods 1. Preparing Salt solutions: * Measure salt required into a cup on scales * Then Add the salt to the amount of measured volume of water Salt concentration (c) (By weight) Grams of salt to add (s) 250ml Tap 0g 0.25% 0.6g 0.50% 1.3g 0.75% 1.9g Amount of salt to add (in grams) to demineralised water (in millimeters) for various salt solutions. 2. Preparing a Petri dish or bowl * Take cotton or a sheet of paper towel * Cut out a circle shape enough to fit in the bowl or Petri dish chosen * Do that 4 times and place the cut outs in each bowl or Petri dish 3. Labeling- Add a label on each bowl or Petri dish stating the amount of salt concentration which will be placed, which are 0.25 %, 0.5 %, 0.75% and tap 4. ...read more.

Conclusion

There were many things, which I did to ensure that this experiment could be accurate as possible such as- * Placing a lid on the on the bowl to prevent any loss of water through evaporation so that we could be sure that the seed was absorbing everything that was given to it. * Picking up the seeds with tweezers to prevent any internal or external damage to the seed. * Using a controlled experiment to be able to come up with better results. * Checking the plant on a regular basis to make sure experiment is working properly. * Spreading the seeds far apart so they have space to grow and won't end up being way too close to each other which would limit the space for growth not giving us reliable results. * Using a measuring beaker while measuring and not just assuming the measurements. There was however one thing that I could do next time to get even a better understanding of the experiment is use even more different amount of salt concentrations so then I would have had even a wider range of data to understand from. Follow up experiment: After this experiment we can continue it with another experiment where we can focus on another factor which influences germination such as the effect of amount of water on germination. In which we can try and place different amounts of water on the seeds and see the difference. ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our International Baccalaureate Biology section.

Found what you're looking for?

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

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 International Baccalaureate Biology essays

  1. Marked by a teacher

    Biology: Lab report Germination

    4 star(s)

    Do not forget to label each of the Petri dishes so as not to get confused later. 2. Cover the bottom of the Petri dish with a layer of cotton wool. 3. Sprinkle thirty cress seeds in the Petri dish, on the cotton wool. Water until cotton wool is drenched.

  2. Seed Germination Experiment. How would different levels of temperature of water affect the rate ...

    Certain seeds need different types of factors that will affect their germination process. For this particular lab, long beans seeds were used and according to the website, it shows that the water temperature for this type of seed germination should be about from 17�C-20�C (www.actahrt.org/members/showpdf?bookr=5794).

  1. The effect on osmosis on the egg shell

    The process occurring in set 3 can be compared to process of dehydration in humans. People cannot drink salt water in order to hydrate the organism because the water from our cells diffuses outside where is high concentration of solute, i.e.

  2. Biology Lab - frequency of cell division in animal and plant cell

    = 7 X 100 50 = 700 50 = 14% Telophase (%) = 2 X 100 50 = 200 50 = 4% Presentation: Figure 1. The pie graph represents the percentage of cells dividing in onion root tip cells. Figure 2.

  1. Potato IA Lab. This experiment tested osmosis when dealing with different concentrations of ...

    Weight After (g) Change (g) % Change Test 1 3.7g 2.3g -1.4g -37.8g% Test 2 3.6g 2.4g -1.2g -33.3g% Test 3 3.6g 2.3g -1.3g -36.1g% Test 4 3.6g 2.5g -1.1g -30.6% Test 5 3.5g 2.5g -1.0g -28.6% Average 3.6g 2.4g -1.2g -29.6% The percentage of change was calculated by dividing the amount of change by the original weight.

  2. Investigating the Effects of Salt on Seed Germination

    * The same seed species used (cress seeds) the same depth of planting. To make sure that all the cress seeds are planted the same distance into a cotton wool ball, we will carefully place them on the surface of the cotton wool ball, ensuring that we do not apply any pressure.

  1. Beet Lab. Aim: To determine the effects of temperature on the permeability of ...

    The absorbance increases with a raise in temperature while the transmittance is quite the opposite it decreases with an increase in temperature. Evaluation: Error How will it affect? Rectification 1. Different beetroots used for taking out cores We might have obtained cores of different beetroots, and since different beetroots have

  2. What is the effect of increasing pH concentration (pH 3, 4, 5, 6 and ...

    dish Procedure * 5 Petri dishes were taken with lids and labeled pH 3, 4, 5, 6, 7. (3 replicas for each pH was kept) * pH solutions of different levels are made using sulphuric acid. * pH1: 4cmáµ of 1M sulphuric acid and 40cmáµ of distilled water.

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