The Effect of Salinity on Early Germination of Phaseolus Vulgaris BIO 109 Dr. Thomas Montagno March 14, 2013 ABSTRACT The early germination characteristics displayed by Phaseolus vulgaris during exposure to increased concentrations of saline solution was investigated. Common bean seeds were counted and separated into 8 groups of ten. The groups of seeds were placed into folded paper towels and saturated with previously determined specific concentrations of saline. The saline soaked paper towels containing the beans were placed into labeled plastic bags corresponding to their concentration of saline, loosely closed, and left to germinate at room temperature (37° C). After a period of 7 days, the bags were opened and contents examined.
The first tube had no sodium thiocynate. The next five were given increasing amounts by two ml for each test tube. In each test tube, an amount of 1.00 M nitric acid was
Innate behavior is an unlearned, inherited fixed action pattern, while learned behavior is not inherited but gradually ascertained throughout the life span of a species. Methods and Materials Seven experimental apparatus’ were constructed, like the one in figure 1. Two petri dishes were cut so as to be connected at one end then glued together on a small portion of wood blocking. The petri dishes simulate the testing environment and the connected end allows the specimens to move freely in between scenarios. First the phototaxis experiment was conducted by placing five Armadillidium vulgare in each side of the petri dish for a total of ten in the overall created environment.
Thus, when sugar and yeast were mixed together in a test tube with no oxygen, carbon dioxide was released into the balloon, causing its circumference to grow larger. But, when sugar was not mixed with the yeast, there was no additional source of energy and thus, the sizes of the balloons were smaller. Some suspected experimental errors are inaccurate measurements and the loss of carbon dioxide gas before balloons were placed over the test tubes. Because of the shortage of time, the measurements taken of yeast and sugar were
Blood glucose levels then slowly declined for each successive measurement. Levels decreased an additional 25.1 mg/dl to 118.9 mg/dl at the 60 minutes measurement, 3.3 mg/dl to 115.6 mg/dl at 90 minutes, and 14.6 mg/dl to 101.0 mg/dl at 120 minutes. At the two-hour measurement, the blood glucose level was 12.3 mg/dl over the baseline measurement of 88.7 mg/dl. For the control group, consuming 296 ml of water did not greatly affect blood glucose levels. The trend was a slight decline from the baseline measurement of 99.0 mg/dl to the two-hour measurement of 89.4 mg/dl.
The researchers conclude that increasing nitrogen levels by 10% in tomatoes is not beneficial. Would this be a well designed reliable experiment? Support your decision with at least three reasons. Yes because they repeated the experiment twice in two different fields, only 10% in tomatoes is not beneficial, and all plants received the same levels of sunlight, water, and with same soil. Example 3 (5
Next I placed each of the slides under the microscope from day zero and viewed how many cells were present for each sample. Since each slide held only .5 mL I multiplied by two since the chart called to measure by a full mL. After day one of viewing each type I did the same thing over until I reached day 16 to observe what had taken place. Table 1: Paramecium Growth Data P. aurelia grown alone, cells/mL P. caudatum grown alone, cells/mL P. aurelia grown alone, cells/mL P. caudatum grown alone, cells/mL Day 0 2 2 2 2 Day 2 10 10 8 10 Day 4 52 30 36 24 Day 6 88 52 68 20 Day 8 104 60 76 14 Day 10 100 60 88 8 Day 12 100 56 98 6 Day 14 100 56 92 0 Day 16 94 56 94 0 Figure
Also, data showed that pea seeds had higher, more successful germination rates than bean seeds in cool temperatures. Overall, the hypothesis was supported by the data found in through the experiment and pea seeds should be grown in cooler temperatures, whereas bean seeds should be grown in warmer temperatures. Introduction: Seed propagation involves either the natural or assisted placement of seeds in favorable conditions to promote germination. By definition, germination is “the process by which a dormant seed begins to sprout and grow into a seedling under the right growing conditions” (www.biology-online.org). The purpose of this experiment was to investigate on which seeds have the highest germination rate in varying climatic temperatures.