It is expected that the the length of the radical would decrease as the salt solution increases. Hypothesis: I think that when the NaCl solution concentration increases the length of the radical would decrease. The fact is that as the salt solution concentration increases it weakens the plant ability to absorb water/ nutrients in order to grow. Variables: Independent: Salt concentration (0.0%, 0.2%, 0.4%, 0.6% and 0.8%) Dependent: Length of radical (cm) Controlled variables: Controlled? Amount of seeds (mung beans) per petri dish (8 beans) How?
3. How will the concentration of sucrose in water affect the amount of water that diffuses into or out of the potato cells and thereby change the mass of the potato cells? Hypotheses: 1. If the solution inside the dialysis tubing is hypertonic to the water in the beaker, then the glucose will diffuse out of the bag, and the water will diffuse into the bag, however the starch will remain in the bag. This will occur because the water and glucose are small enough to diffuse out of the pores in the dialysis bag, but the starch molecules are too large to fit through 2.
Phosphate comes from a rock that gradually breaks down and will release other ions. Human impacts phosphorus cycle by using phosphorus containing fertilizers to make animal feed, detergents, and other products. This cycle is a common limiting factor in soils and added to croplands to greatly stimulate the production. When this cycle moves from the soil and gradually makes it way to the ocean, it creates problems such as water pollution. The Nitrogen cycle has similarities to the carbon cycle and the phosphorus cycle.
We resulted that lead, silver, and copper are the strongest oxidizing agents, and that magnesium and zinc are the weak oxidizing agents. The strong oxidizing agent oxidized the weak oxidizing agent and in turn the strong oxidizing agent got reduced while oxidizing the weak agent. When a reaction occurred, the solid metal reduced the ion, and in turn made it the more reactive metal. In part two we used a solvent extraction technique to derive an activity series for the halogens. With the use of this technique we placed chlorine, bromine, and iodine into solutions containing chloride, bromide, and iodide.
This is the same with the orange juice. Sugar can affect plant growth too. Over expressing Arabidopsis in plants reduces growth in plants. Due to hypertonic states of different liquids, some juices and sodas can kill plants. This experiment will look at how soda, juice, and water will affect the growth of plants.
After harvesting the cocoa beans, they are fermented, dried and fumigated locally before being sold. The quality of the cocoa bean depends on the quality of this process. Common processing problems at that stage result in ‘slatey’ beans, i.e. beans that have not been properly fermented, and germinated beans that are susceptible to insect damage. The quality of cocoa beans is further judged based on their flavour, their size regularity and their fat content.
As for the growing end of the spectrum, Pollan then goes on to say that “It (corn) had to adapt itself not just to humans but to their machines” (30). Farmers eventually found inventive ways to mass produce this crop. Planting the crops in such a close proximity created not just more space, but also caused the plants to grow upward. This meant that it was easier for machines to come in and extract the corn, so this ushered in the use of fossil fuel. These machines were created not just to cultivate the land, but to also apply large quantities of chemicals to the crops to prevent insect infestations.
Science, Health, and Environmental Issues Pamela Ward Eng122: English Composition 2 Prof. Iris Chao October 27, 2013 Phosphates and Nitrates Phosphates and Nitrates are chemicals commonly found in water. Even though they are not harmful in small quantities, they are harmful if they exist in large quantities. Farms use fertilizers containing large amounts of nitrates and phosphates, so they can build up water near industrial-scale farms. In a body of water in which nitrate levels have risen to high levels, these chemicals can cause excessive algae growth. When the algae die and decompose, they deplete the available oxygen in the water for fish, causing them to die.
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.
Furthermore, corn and soybeans are predominantly used as tangible means for biofuel. Developed countries are usually giving the subsidies, so with the production of corn increasing rapidly and incentives for farmers to plant more of it the policies are beneficial to the developed countries. Land owners would wreak benefit as well because the more ethanol and biofuel needed the more land needed to grow corn and soy beans. However consumers will suffer by paying more for corn as the demand for ethanol continues to increase. Brazil’s absolute advantage in the sugar cane production suffers from the policies to promote the production of ethanol and the tariff barriers placed on sugar cane imports.