Measuring Rate of Rater Uptake by a Leafy Shoot
The water uptake can be measured easily and because very high
proportion of the water taken up by a stem is lost in transpiration,
it enables the rate of transpiration to be measured.
Key Factors to be kept Constant: -
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v Temperature - room temperature (approximately 25ºC)
v Wind speed - No artificial wind was produced to affect results
v Light intensity - Extra light was not used
v Humidity - it was not humid on the day experiments were conducted
The water uptake for the control Experiment.
Time (minutes)
Initial meniscus position of the air bubble (cm)
Final meniscus positionof the air bubble (cm)
Water uptake
(Distance moved) (cm)
Total water uptake (cm)
1
10.0
10.7
0.7
0.7
2
10.7
11.5
0.8
1.5
3
11.5
12.3
0.8
2.3
4
12.3
13.0
0.7
3.0
5
13.0
14.0
1.0
4.0
6
14.0
14.8
0.8
4.8
The water uptake when Vaseline is applied on the top surface of the
leaves.
Time (minutes)
Initial meniscus position of the air bubble (cm)
Final meniscus positionof the air bubble (cm)
Water uptake (Distance moved) (cm)
Total water uptake (cm)
1
6.0
6.6
0.6
0.6
2
6.6
7.2
0.6
1.2
3
7.2
7.9
0.7
1.9
4
7.9
8.5
0.6
2.5
5
8.5
9.2
0.7
3.2
6
9.2
9.7
0.5
3.7
Time (minutes)
Initial meniscus position of the air bubble (cm)
Many variations and species of plants can be found all around the world and in different habitats. These variations and characteristics are due to their adaptations to the natural habitat surrounding them. In three of many climatic zones, the arid, tropical and temperate zone, plants that vary greatly from each other are found in these locations. In this experiment, we’ll be observing the connection between the adaptations of the plants to their environment at the Fullerton Arboretum. The arboretum is a space containing numerous plants from different environments. The plants are carefully looked after and organized into their specific habitat. Therefore, we’ll be able to take a look at the plants within multiple
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The fair testing will be carefully checked so the results do not come out to be void. The light intensity will be changed for it is the only variable used in the experiment. Though the temperature, watt of the bulb, amount of water, size of the plant and posit...
Conclusion: Finally, water molecules are moved from high concentration to low concentration Based on the data collected and the results of the experiment, the hypothesis was correct.
To make the test fair I will use the same amount of water and the leaf
Introduction: Sunflowers are classified under Kingdom Plantae. Sunflowers are unicellular eukaryotes that are autotrophic. This means that they have specialized cells, with a membrane bound nucleus and membrane bound organelles. The term autotrophic means that the plants have the ability to produce their own energy.
The results verified that the spinach had the highest chloroplasts concentration because it had the absorbency of 0.730, 0.826, 1.011, and 1.049 as shown in Table 1-4. The spinach was our positive control because, from a previous experiment, we knew that it would have chloroplasts; the buffer sucrose was the negative control because if the cabbage or lettuce did not have any contents of chloroplasts, then the readings should be equivalent to the buffer sucrose since it was our blank solution. Therefore, it should read 0.00, if there were no contents of chloroplasts. On the other hand, there was a flux in the data between the cabbage and the lettuce. However, the overall data suggested that the cabbage had a higher content of chloroplasts than
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Two members of the group were instructed to visit the laboratory each day of the experiment to water and measure the plants (Handout 1). The measurements that were preformed were to be precise and accurate by the group by organizing a standardized way to measure the plants. The plants were measured from the level of the soil, which was flat throughout all the cups, to the tip of the apical meristems. The leaves were not considered. The watering of the plants took place nearly everyday, except for the times the lab was closed. Respective of cup label, the appropriate drop of solution was added to the plant, at the very tip of the apical meristems.
The Effect of Absorption Rate on Light and Dark Colored Leaves. A particular leaf color may have an effect on the leaf’s absorption rate. An experiment was conducted to determine the relationship between a leaf’s absorption rate and color. A group of students tested spinach, cabbage, and no chloroplast solutions to determine the relationship it has with the absorption rate. It was found that darker colored leaves have a higher absorption rate than lighter colored leaves when analyzed from the graphs. This is highlighted by noting that the lighter colored leaves remained constant during the majority of the experiment. It was concluded that a leaf’s pigment can affect the amount of light energy being absorbed in different wavelengths.
Investigating the Rate of Transpiration in a Mesophyte Plant Experiment to investigate the relationship between the number of
the distance from the light source to the plant. Output - The rate of photosynthesis is to be measured by counting the bubbles of oxygen produced by the plant every two minutes, and therefore finding the rate of photosynthesis. Control - The amount of water available to the Elodea will stay the same. same level as the 400 cm3 beaker. The colour of the lamp will stay the same (yellow) as to plants Chlorophyll easily absorbs blue light.