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

Investigation into Cress Seeds

Extracts from this document...


Investigation into Cress Seeds PLAN Aim:coec ecr seececw orec eck inec foec ec; I will be investigating into the 'height' characteristic for each of the six cultivars of cress. I have chosen height because I want to choose a characteristic with continuous variation. A characteristic with discontinuous variation will not provide any readable results, therefore with a continuous variation characteristic, I can compare the differences in variation more easily. From this, I can also compare the selective breeding. Here is a diagram to explain what I mean by this: Heidegger obfuscated ronen's functionalism . SELECTIVE BREEDING E.g. height of carrots Height (mm)coee eer seeeeew oree eek inee foee ee. Selective breeding is the crop which is only allowed to breed. For example, Carrots wih highest lengths are required. To achieve this farmers have tried to overcome by this by controlling the two factors, which influence this characteristic, the environment and genes. A plant may have inherited genes for tallness HH, but has not got enough of the three main elements needed to grow, water, minerals and sunlight from its environment.cofd fdr sefdfdw orfd fdk infd fofd fd. Therefore, farmers first grow cress in ideal environments with sufficient light, water and minerals. Only the tallest crops are then selected to breed together. A new crop is grown. From that crop another batch and once again only the tallest crops are selected to grow. If we were to look at the graph and see the height with the highest number this would be the selective breeding crop. ...read more.


Safe Test: To ensure a safe test I must � Be careful NOT to drop the tray when taking it to the sink to be watered. � '' '' when cutting roots with the scalpel. OBTAINING EVIDENCE: RESULTS TABLE TYPE GERMINATION NO. HEIGHTS (mm) Lepidium 16 4, 5, 8, 8, 10, 10, 12, 12, 12, 13, 13, 13, 13, 15, 16, 19, Organic 22 + 1 15, 15, 20, 30, 34, 34, 35, 35, 36, 37, 37, 37, 38, 38, 38, 40, 40, 42, 45, 45, 46, 51 Thomson Morgan 22 + 1 20, 26, 29, 30, 34, 34, 35, 38, 38, 40, 41, 41, 43, 45, 45, 45, 46, 46, 47, 50, 51, 52 HurstCurled 19 5, 5, 8, 10, 10, 10, 10, 11, 11, 12, 15, 15, 16, 18, 19, 20, 23, 30, 30, Mr. Fothergills 23 16, 20, 23, 23, 24, 27, 30, 33, 33, 34, 35, 35, 37, 37, 37, 40, 40, 40, 40, 40, 40, 43, 45, Cress curled 25 20, 22, 22, 23, 23, 25, 25, 25, 25, 30, 32, 33, 33, 33, 33, 35, 38, 38, 38, 40, 40, 40, 40, 40, 41, * Numbers added on, are seeds that have germinated, but have not yet grown shoots. I have taken my results and placed them into a table for all six cultivars of cress. (See table). I have also used the results of others to show evidence of secondary data. This has helped me to make my results more accurate. ...read more.


Below are some reasons. Anomalies: Though my results were quite reliable, I still ended up with few anomalies. This could have been caused by the following reasons: � Positioning of tray - some cress seeds may not be receiving the same amount of sunlight as the others so the rate of photosynthesis would have varied. � Watering - We may have watered our cress at different times. N.B. For two days it was cloudy and therefore no watering was needed on those days. I did not water my cress but others may have. � Positioning of seeds - We may not have all equally placed our seeds so competition may have affected this. I have circled anomalies and noted what could have possibly caused this. Improvements: � I would take more care in preparation using the same size petri dishes and taking more care in placing the seeds. This would make the competition fair for each cultivar. � I would place them in a much more controlled environment. All of them would be placed in similar areas where the would receive the same sunlight. � I may use a larger data than just 25 seedlings per cultivar. Further Improvements � I could have carried out two lots of results if more equipment was available. This way I may not need to use other people's results. � I could have investigated into another factor, which I could have provided more scientific reasons for. E.g. 'would cress grow better in cotton wool or sugar paper'. we can say that whilst this represents a progression, in the end ...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 Green Plants as Organisms 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 GCSE Green Plants as Organisms essays

  1. Marked by a teacher

    An investigation into the effect of a germination inhibitor on the germination of seeds.

    3 star(s)

    If the temperature is too low, germination will be slowed, if the temperature is too high, germination may be grossly accelerated.] o Light intensity. Again may perhaps be difficult to keep constant, unless artificial light is used. [The amount of light may have an effect on how the investigation will

  2. An Investigation To Show What Different Factors Affect The Growth & Germination Of Cress ...

    Different nutrients are needed for different uses e.g. Iron for strengthening the stem. The factor that I wish to investigate is how different minerals affect the germination and growth of plants. The aim The aim of my experiment is to see how 3 different solutions lacking 3 different minerals affect the growth and the germination of a plant.

  1. An investigation into the effects of different concentrations of lead chloride on the growth ...

    Prediction: I predict that as the concentration of lead chloride increases, the growth of the cress seeds will decrease. The lead chloride will inhibit the growth of the cress seeds. Preliminary Experiment: Preliminary work was carried out, so when the final experiment is carried out, the best results are able to be obtained.

  2. Factors That Germination Influence

    This is because the variation between the results gathered and the expected results need to be measured to check if there is a significant difference. Then the results will be checked against the published data table to see whether the result is within the 5% significant difference range. Concentration (%)

  1. An Investigation into Species Diversity with distance along a Pingo.

    Compaction reduces the amount of air in the soil, therefore trampling would reduce the species diversity of an area by reducing the carrying capacity of the soil. Oxygen is needed by plants for oxidative phosphoryllation in respiration. The oxygen is needed to accept electrons from the oxidised hydrogen in the electron transport chain.

  2. The investigation is aiming to look at transpiration.

    They have tapering end walls that overlap with adjacent tracheids in the same way as scelerenchym fibres. Thus they have mechanical strength, which enables them give support to the plant. The tracheids characterize the original primitive water conducting cells of the vascular plants and are the only cells found in the xylem of most primitive vascular plants.

  1. Investigation into the effect of varying concentrations of potassium nitrate solution, on the germination ...

    It demonstrates the importance of temperature in seed germination. At very low temperatures the enzyme reactions inside the seed can take place only very slowly. This is because molecules have very little energy and so move very slowly. Collisions between substrates and enzymes are infrequent and, even when they do collide they may not possess enough energy to react.

  2. The effects of organic effluent from the seweage on the biodiversty in a freshwater ...

    they were due to the release of organic effluent from the sewage in the in the fresh water stream and not due to any random errors. T-test: The t-test assesses whether the means of two groups are statistically different from each other.

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