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During germination and growth of a cereal, the dry weight of endosperm, the embryo and the total dry weight were determined at two day intervals. The results are shown in the table below: a) Using the same axes, draw graphs of dry weight of endosperm, embryo and the total dry weight against time.

Biology

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Step-by-step solution

4 steps

To draw the graphs, follow these steps:

  1. Set up the axes.

    • Draw a horizontal axis (x-axis) for "Time after planting (days)". Label it clearly and choose a suitable scale (e.g., 1 cm represents 1 day). The range should be from 0 to 10 days.
    • Draw a vertical axis (y-axis) for "Dry weight (mg)". Label it clearly and choose a suitable scale (e.g., 1 cm represents 5 mg). The range should be from 0 to at least 45 mg (the maximum value in the table).
  2. Plot the data points for each variable.

    • Dry weight of endosperm: Plot the points (0, 43), (2, 40), (4, 33), (6, 20), (8, 10), (10, 6).
    • Dry weight of embryo: Plot the points (0, 2), (2, 2), (4, 7), (6, 17), (8, 25), (10, 33).
    • Total dry weight: Plot the points (0, 45), (2, 42), (4, 40), (6, 37), (8, 35), (10, 39).
  3. Draw the curves.

    • Connect the plotted points for each variable with a smooth curve or straight lines. Use different colors or symbols for each curve to distinguish them.
  4. Label the curves and add a title.

    • Label each curve clearly, for example, "Endosperm Dry Weight", "Embryo Dry Weight", and "Total Dry Weight".
    • Add a title to the graph, such as "Changes in Dry Weight of Endosperm, Embryo, and Total Dry Weight During Germination".

    Expected appearance of the graphs:

    • The endosperm dry weight curve will start high and show a continuous decrease over time, indicating that the stored food is being utilized.
    • The embryo dry weight curve will start low and show a continuous increase over time, indicating growth of the embryo.
    • The total dry weight curve will start at 45 mg, decrease initially (due to respiration and loss of water), and then show a slight increase or stabilization towards the end as the seedling begins photosynthesis, but overall, it will show a general decrease from the initial value.

    2 zimekamilika. Zimebaki 3 leo — tuma inayofuata.

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