Snail & Elodea Formal Lab ReportLovedine Compere Margaret McGrath, Kelly K. Meghann Panarello, College Prep BiologyMs. van Riel4 December 2017Introduction: Photosynthesis is a process used in plants in order to provide the plant cells with the energy it needs which is glucose. Cellular reaction makes ATP from the energy stored in the glucose. The two processes of photosynthesis and cellular respiration are related to each other. Photosynthesis is the process where Water, Sunlight, and carbon dioxide come together and produce glucose and oxygen. However cellular respiration uses glucose and oxygen produce water, ATP, and carbon dioxide. The organisms that produce their own food through the process of photosynthesis are known as Autotrophs and are plants, some bacteria, and some protists. All living organisms perform cellular respiration in order to make energy for the cell. Elodea is a plant that is ” of five or six species of submerged aquatic plants in the frog’s-bit family”. Elodea is often known as the Canadian Waterweed. It is not originally from the new world but from places such as Asia, Africa, Australia, and Europe. “Elodea are herbaceous perennials that feature dark green leaves arranged in whorls of two to seven along the stem”. This plant is only capable of reproducing asexcually. Another main material of this lab is what is known by the average human as pond snail in the scientific world is known as Lymnaea stagnalis. The pond snail is most commonly found in Northern Africa, The Mediterranean, Pan-Africa, and Europe. The animal mostly stays in stil waters suchs as, pools, rivers, reservoirs and others. This lab tested many different hypotheses which include Hypothesis one which tested if snails give off CO2. Hypothesis two tested if Elodea take in CO2. Hypothesis three tested if Elodea use CO2 snails give off. Hypothesis four tests if snails give off CO2 in the dark. Hypothesis five tested if Elodea take in CO2 in the dark. Hypothesis six tested if Elodea use CO2 snails give off in the dark. Hypothesis 7 tests if Elodea give off CO2 in the dark. Results: Hypothesis Experimental SetupExperimental ResultsSnails give off CO2 Elodea take in CO2 Elodea use CO2 that snails give offSnails give off CO2 in the darkElodea take in CO2 in the darkElodea use CO2 that snails give off in the darkElodea give off CO2 in the darkConclusion: In this experiment ,performed by different teams of students, many different hypotheses were tested as well as what happens to different organisms under different conditions. It was discovered that snails are able to release CO2 in both the light and the dark because the process of Cellular respiration does not require light energy in order to happen. In hypothesis two The Elodea was able to take in CO2 because it went through photosynthesis but it can not do the same in the dark because without the light it cannot go through Photosynthesis. Elodea can release CO2 in bothe the dark and the light because for the process of cellular respiration light is no required. Elodea was unable to take in CO2 from the snail in the dark. The snail could perform cellular respiration in the dark because light is no needed. However the Elodea was unable to take in that CO2 because it cannot go through the process of Photosynthesis in the dark. In this lab there were many sources of error for example the snail died therefore the results for the hypothesis it was in were inconclusive. Another source of error was even though the tops of the tubs were sealed CO2 escaped which had a negative impact on the data. This lab can teach one that not all controlled experiments can be successful. It takes a lot of work and energy to make an experiment work and human errors can always occur. Working with live animals can cause a miscalculation in the results because the animals can always somehow become unable to perform their duties. This lab is a great lab for students to do because it will allow them to learn a great deal in science and the way that setting up a controlled experiment works. Works Cited Peters, kristian. “Elodea.” Encyclopædia Britannica, Encyclopædia Britannica, inc., 14 Mar. 2017, www.britannica.com/plant/Elodea.Seddon. “Lymnaea stagnalis .” Lymnaea stagnalis (Great Pond Snail), IUCN Red List, 2017, www.iucnredlist.org/details/155475/0.