30 Leaf Photosynthesis Lab

Have you ever really wondered how different variables can affect how plants go through photosynthesis? Well, in this experiment, the purpose was to see how various environmental conditions can affect the overall photosynthetic capacity of a specific plant. The factors, light, darkness, cold, and heat were applied to see how the different components would affect the photosynthesis on spinach plants. Each group was given a different factor to test. Out group was given the light factor. The hypothesis for this experiment is that when adding light as a factor, the light will affect the overall plant photosynthesis.

The purpose of this lab is to observe the effect of white, green, and dark light on a photosynthetic plant using a volumeter and followed by the calculation of the net oxygen production using different wavelengths color of white and green light, and also the calculation of oxygen consumption under a dark environment, and finally the calculation of the gross oxygen production.

Figure 1: . In 2010 A cartoon by Piraro about how fast food effect pigeons which representing the people who addicted on fast food.

Wisconsin Fast Plants are known to be great educational tools for classroom experiments. They germinate quickly and are easy to take care of. These plants germinate after 1 or two days and have a life span of about 30 to 40 days. (Marin and Terrana, 2004).

Discussion: In our lab, we tested our question which was, “will the amount of light exposed affect the rate of transpiration?” We made the independent variable the plant and the dependent variable was the amount of light exposed. Our non-control variable was the difference in light, this affected the conditions of transpiration because light is needed for photosynthesis. Stomata open when they are exposed to light and stomata is important because it allows for carbon dioxide to be available. Our hypothesis was that the rates of transpiration would occur faster if the plants were exposed to light. Our results were that in plant A the weight decreased by .19 grams, in plant B the weight decreased by .46 grams, in plant C the weight decreased by .44 grams, in plant D the weight decreased by .17 grams, in plant E the weight decreased by .47 grams, and in plant F the plant decreased by .26 grams. We also calculated the percent of water lost instead of the amount of water lost because the plant all had different amounts of water when

In conclusion, the hypothesis is supported by the experiment. Only 2/10 disks floated to the top of the 0.1% NaHCO3 solution, while all 10 of the disks in the 0.2% NaHCO3 solution floated to the top. A potential follow-up experiment could be to test the affects of increased concentrations of carbonation on PS (Bagley et al., 2015). There was the possibility of human error and bias having impact on the experiment. When using syringes, the plunger may have been pulled too harshly and damaged some of the disks. This could have led to disks not floating to the top in the experiment. Another form of error could have been the use of disks that were cut from the veins of the leaf, which has less chloroplasts, meaning less process of photosynthesis happening, and result in the disks not floating to the

Photosynthesis is a vital process that requires to utilize energy for plants. This experiment was done to evaluate the effects of carbon availability on photosynthetic activity. The aquatic plant Elodea densa was placed into sodium bicarbonate solutions of five concentrations ranging from 0.1% to 1.0%, in five independent trials (excluding the negative control treatment of water). The temperature and light intensity was constant. The results indicated a directly proportional relationship between the availability of carbon dioxide and the rate of photosynthesis of Elodea Densa, as photosynthesis continued to increase with increasing amounts of bicarbonate. The most O2 amount of oxygen produced was with the 0.7% NaHCO3 concentration and least with the control of water. The null hypothesis that stated carbon concentration does not affect rate of photosynthesis of the aquatic plant was rejected. The predicted hypothesis that an increase in bicarbonate concentrations results in an increase in the photosynthetic rate was accepted. In conclusion, there is a significant increase in photosynthetic activity as the concentration of NaHCO3 increases.

1. What did Joseph Priestley find in 1780? In 1780, Joseph Priestley constructed that plants could "restore air which has been injured by the burning of candles." 2.

The intention of this experiment is to determine the effects of pH on the rate of photosynthesis in living leaves. Photosynthesis is a process by which plants convert light energy captured from the sun into chemical energy which they use to perform various plant functions. During the photosynthesis process, light, carbon dioxide, and water react to produce products: sugar and oxygen. The equation for photosynthesis is:

In this experiment the effects of exogenously applied RA on early neural development of zebrafish embryos were observed. It included immunocytochemical and histochemical analysis of the developing embryos along with quantitative analysis of their anatomy. Knowing that RA is a positional signaling molecule, they wanted to observe the changes that occur to the anatomy of the zebrafish embryos at different stages when exposed to RA. Embryos at 50% epiboly and midgastrula stage were exposed to RA concentrations ranging from 10-9¬ to 10-6 M, and embryos at early and late gastrula stages were exposed to RA concentrations of 10-7 M. For immuniohistochemical analysis, antibodies 4D9, HNK-1, and MZ15 were used, HNK-1 was used as a marker of neural crest migration, MZ15 in labeling notochord tissue, and 4D9 in identifying engrailed

Introduction The objective of this lab was to determine if light color had an effect on photosynthesis rates in the aquatic plant Elodea. Other studies have taken place on different plants such as a study in 2013 the effects of red, blue, white, and far-red LEDs were tested on Wasabia Japonica seedlings. In that study it was found that a mixture of red and blue light yielded the highest rate of growth (Kim & You, 2013). For this lab it was hypothesized that violet and blue light (400-500 nm) would yield the highest growth rate, while green and orange would yield the lowest rate.

In photosynthesis, there are two types of reactions; one is light dependent and second one is light independent. During the light reaction, the light energy from sun is converted to chemical energy in the form of ATP and NADPH. This chemical energy is then used in second light-independent reaction to convert atmospheric CO2 to sugar and this process is also known as carbon fixation. The second cycle that occurs in absence of light is also called Calvin cycle. Along with sugar molecule, O2 is released as a by-product.

Photosynthesis is essential to all living organism such as animals and plants. Photosynthesis is a process used by plants and other autotrophs to capture light energy and use it to power chemical reaction that converts carbon dioxide and water into oxygen, carbohydrates and water. (Textbook: Principles of Biology). The reactants and the products of photosynthesis are:

For lab 12, it is hypothesized that chlorophylls a and b are present in a plant leaf and contribute to the starch production in photosynthesis. Also, products of photosynthesis will be present in leaf tissue exposed to red and blue light wavelengths for several days, but a decreased presence in leaf tissue exposed to green and black light wavelengths. In lab 13, it is expected that since chlorophylls a and b are more polar and smaller molecules than the anthyocyanins and carotenoids, they will travel higher up the chromatography paper than the other pigments.

Photosynthesis is a vital process that autotrophs use to transfer light energy into chemical energy. Photosynthesis ultimately produces O2 and glucose. It, like many other biological processes, can be affected by environmental variables. The variable that we altered in the following experiment are intensity, light wavelengths, and pigment types. In order to do this, we conducted three experiments. In the first experiment, we examined the effect of light intensity by placing vials with chloroplasts with DPIP at different light distances in which the results varied. Initially, 30cm away was the most effective for photosynthesis. Then 24cm appeared to be the most effective. Followed by 49cm at minutes 25 and 30. In the second experiment, we