competition report

competition report - Andrea Brisker 11/27/07 Bis 1C Zac...

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Andrea Brisker 11/27/07 Bis 1C Zac Chestnut Competition Report Introduction: In this experiment, we tested how lack of resources limits the growth patters of radishes ( Raphanus sativus ) and compared it to the growth patterns of a flour beetle ( Tribolium confusum ) population. The radishes represent a modular organism. This means that they have repetitive parts. Most organisms in the world are modular. (Canington et al. 1991-2007). Also, modular organisms conserve the same shape as they grow (Sanchez et al.). Modular organisms have no restriction on their growth patterns and have structural plasticity unlike unitary organisms. Two different plants of the same species vary greatly in size. On the other hand, the flour beetles represent unitary organisms. These are organisms that are all slightly different: they genetically vary with each individual. Unlike modular organisms, unitary organisms only vary slightly in size because their growth is predetermined (Canington et al. 1991-2007). This experiment allowed us to see the effects of limited resources on determined growth (pre-collected beetle growth data) and indeterminate growth (radish plants that the class grew in lab). Each lab section was split into five groups of five. Each of these groups was given four pots to grow the radishes. The groups had one pot with two seeds, one with four, one with eight, and one with sixteen. The seeds were planted and then watered. After a few weeks the plants were taking out of the greenhouse, and each group took down data about the plants (i.e. how many seeds grew, and biomass). While planting the seeds, the prediction was there would be radish plants in the pots that had more seeds because the seeds had less space to grow in. organisms, unitary organisms only vary slightly in size because their growth is predetermined (Canington et al. 1991-2007). Materials and Methods:
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All methods and materials for this experiment provided in the lab and the manual were followed exactly. (Canington et al. 1991-2007). Results:
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competition report - Andrea Brisker 11/27/07 Bis 1C Zac...

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