Abstract Intraspecific and interspecific competition plays a major role in stabilizing environments. These mechanisms ensure that no species can go beyond its environments carrying capacity. The purpose of this lab is to determine the effects of density on biomass of plants and the effects of predators and abiotic factors in an environment. This will be tested with the spinach plant Spinacia vulgaris of varying densities in the same sized pots and with the use of P. aurelia, P. bursaria and P. caudatum divided into control and experimental groups. The results showed that the increasing of the density leads to a decrease in the biomass of plants and that the experimental groups are not much different than the control groups.
Plant Growth 1 Running Head: PLANTS AND HOW LIQUIDS AFFECT THEIR GROWTH Plants and How Liquids Affect Their Growth Plant Growth 2 Title page Table of Contents Abstract Acknowledgements Introductions Purpose Problem Hypothesis Variables Materials Procedures Pictures Data Tables Graphs Conclusion Bibliography Table of Contents 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16-17 Plant Growth 3 Plants and How Liquids Affect Their Growth Abstract This experiment is on plants and how different liquids can affect them. The purpose of this experiment is to figure out why different liquids affect plants differently. To do the following experiment you need to 1. Put one plant in each pot of three pots 2. Label one pot A, one pot B & one pot C 3.
Nitrogen fixing bacteria in the roots of leguminous plants reduce atmospheric nitrogen to ammonium using ATP and reduced NAD. The ammonium ions released into the soil are oxidised by nitrifying bacteria firstly to nitrite, and then to nitrate. This oxidation increases the nitrogen content in the soil which plants can use to produces many useful molecules including amino acids, proteins, DNA and ATP. The formation of these ions forms part of the ecological nitrogen cycle which plays a key role in sustaining life on this planet. Plants are the producers for an ecosystem.
Then, we performed an f-test and a t-test to determine if there was any germination difference between the treatments. We hypothesized that ammonium nitrate would promote spore germination because past research on Botrychium dissectum revealed that the presence of ammonium on the medium had a positive effect on spore germination (Melan & Whittier 1990). However, in our experiment, the highest germination was observed on the media lacking ammonium nitrate. We calculated a spore germination mean value of 115.83 on the control group compared to 56.33 on the experimental group. We concluded that ammonium nitrate inhibits C. richardii spore germination.
Melissa Quibin | Zaira Ruiz | Ciarra Valencia | Lea Valencia FST 101 | ST-2L | Group 4 EXERCISE NO. 9 VITAMINS Introduction Vitamins are minor but essential organic substances in human nutrition. Though they provide no amount of energy, they are required for the normal growth, maintenance and functioning of the human body. They are important constituents in considering quality aspects of food quality. Vitamin losses can occur through chemical reactions which lead to inactive products.
This way of improving foods has been taking place traditionally by just crossing two plants together and hoping that the new traits are taken without any negative ones (543). Since this is time consuming and not as accurate, scientists now just introduce the new genes, or traits, through the plants’ DNA. Genetically Engineered foods, although meant to be helpful, pose many problems by causing environmental hazards, human health risks, and economic concerns. To begin with, one of the problems with engineered foods is that they can become hazardous to the surrounding environment. This unintended harm to other organisms is caused by many factors.
. Design a) Defining the problem and selecting Variable I) Aim/Research Question: To investigate the effect of solute concentration on the length of potato strips when submerged in a range of concentrations of sugar solution. II) Hypothesis: If the concentration of the sugar solution increases, then the osmotic gain of the potato strip will decrease. III) Scientific Explanation: Osmosis is a type of passive transport where passive movement of water molecules occurs along a concentration gradient, across a partially permeable membrane. (Damon, )Since the movements of substances in passive transport take place from an area of high concentration to an area of lower concentration until both areas reach equilibrium, the water molecules will move from the potato strips to the sugar solution when there is less water concentration in the solution.
E.g. of antibiotic Penicillin G Damage the cell membrane: causes the cell to take up too much water and lyse by increasing the permeability of the cell membrane. E.g. of antibiotic is Polymyxin B Interfere with protein synthesis: prevents the productions of protein in the invading bacterial cells. E.g.
PURPOSE The purpose of this experiment is to determine whether magnets have an effect on the growth of radish seedlings. I became interested in the study of the effect magnets, when I discovered that magnets could make you heal faster. Later I decided that that it would be a better idea to study the effect of magnets on plants to keep it a safe experiment. The information gained from this experiment may be used to help gardeners growing radishes or other plants. HYPOTHESIS My hypothesis is that the stem of each plant will be attracted to the magnet.
In order to carry out this etiolation the plant must use its food reserves, so if the plant does not find light having used these reserves, it will die. [The pea plant, Pisum sativum, has been a reliable species of plant in the field of biology for many years. Photosynthesis forms the basis for this experiment. 0000000000000000000000000000000000000000000000000000000000000000000000000 materials around it. The energy needed for photosynthesis comes from sunlight, which is the variable for this experiment.