Sara Ellen Goodwin September 28th, 2014 Organismal Biology Final Lab Report Sunlight and Herbivory Responses in Brassica rapa Under Laboratory Conditions Abstract: Set out to understand how the growth of Brassica rapa changes under flood like conditions, plants of the species were grown in lab in varying watering constraints. The study aims to begin understanding the important dynamics between precipitation and plant viability. Seeds were planted in separate pots in identical conditions with estimated average levels and flood levels of water administered weekly (100 mL and 200 mL respectively). Plants were in pots surrounded by plastic mesh at a height of 22 cm for later herbivory response assessments. These experimental parameters were later abandoned.
Multiply each term by the common ratio to find the next three terms. 25 × 0.5 = 12.5 12.5 × 0.5 = 6.25 6.25 × 0.5 = 3.125 The next three terms of the sequence are 12.5, 6.25, and 3.125. 7. 4, −1, ,… SOLUTION: Calculate the common ratio. The common ratio is × × × = = = .
Agriculturally, plants can be genetically transformed to be resistant to pesticides, spoilage, and frost. In bioremediation bacteria can be transformed to be able to digest oil from oil spills. For medicinal purposes, gene therapy is being used to help people with diseases caused by defective genes. The GFP protein is a green fluorescent protein that is the source for bioluminescent jellyfish. This protein causes the jellyfish to glow in the dark.
The question asked for this experiment was at what concentration these harmful chemicals in hairspray would have an effect on plant growth, specifically Wisconsin fast plant radish seeds. It was previously found that concentration of a contaminant in a plant is determined by its equilibrium with its concentration in the soil interstitial water (Chiou, 2001). So, for this experiment, hairspray was mixed with water at a 5%, 10% and 15% concentration before the solutions were added to the plant containers. The growth of each seed was compared to the growth of the control plant that was indulged in only water. The hypothesis for this experiment was that the higher the concentration of hairspray added to the plant, the bigger the effect, and therefore the least amount of growth.
Extended Experimental Investigation Research Question: Does gravity have an effect on the direction of a plants stem and root growth? Aim: To determine the effect of positive and negative geotropism on the root and stem of a germinating bean seed. Theory Review: The response of plants towards and away from environmental stimuli is called tropism. A tropism is a directional movement response which indicates the growth or turning movement of plants. Plants commonly exist in a state of anisotropic growth, where roots grow downwards and shoots grow upwards.
and Weed control experts. Hypothesis If home-made and commercial herbicides are sprayed on weeds then the commercial herbicides will be more effective, because the chemicals are made by experts who know what chemicals kill and prevent weeds. Experiment Fill 2 different boxes and fill then with soil make sure to use the same type and amount of soil. Measure around one cup of grass seed and sprinkle it on the soil. Water the seeds daily until the grass is at least 1.5 inches tall.
Generally they are used to make the foods crops more resistant to pests or having more flavour or appearance. Traditionally, modifications were done through breeding, but recently scientists are using genetic engineering to create exact specifications of what they want. For example, geneticists of plants often isolate a gene responsible aimed at drought tolerance and add that gene into another plant. The genes used are not only from plants, but also from other sources also. Bacillus thuringiensis, a natural bacterium, produces crystal proteins lethal to insect larvae.
The Effect of Alkaline pH on Reaction Rate of the Enzyme Catecholase Introduction Enzymes are essential to the metabolism of biological organisms. Several factors can influence the reaction rate of enzymes: temperature, pH, enzyme concentration and substrate concentration (Ainsley, 2010). Catecholase, an enzyme in the tyrosinase/polyphenol oxidase family, is responsible for the browning seen in potatoes, apples and mushrooms after they are cut (Capworth, 1998). These fruits and vegetables contain small amounts of catechol, along with the enzyme catecholase, that reacts with oxygen in the atmosphere and forms the brown compound benzoquinone (Hemelstine, 2004). This reaction can be delayed or prevented in fruits and vegetables by the addition of acids, such as lemon juice, and by cooking (Hemelstine, 2004).
Studies have investigated the effect of grey water on plant growth, the study was done by M.Travis , N.Weisbrod and A.Gross on the “accumulation of oil and grease in soils irrigated with grey water and their potential role in soil repellency “. These studies suggested that oil and grease can accumulate in soil and affect the soils ability so absorb water. Also in this experiment suggested that the long term effects of irrigation of arid land with was that there was a accumulation of salts, causing changes in the soil properties and toxicity . In this experiment you will be finding out whether grey water made from conventional or eco-friendly detergent, and what the possible side effects are. For this experiment you will need to obtain 6 phaseolus lunatas commonly known as the lima bean , the seed is a flat slightly curved pod .
Breeding plants is the process of selecting plants with the most desirable qualities to produce offspring that inherit these desired traits. Conventional plant breeding genes are mixed and assorted. This results in non-desired traits being inherited together with the trait of interest. It aims to develop improved crop. Crops selected for desirable characteristics that can be reproduced to a variety of needs.