Human Cloning

Human Cloning
Human Cloning The practice of cloning can be used to benefit society and therefore should be legalized. Ever since the cloning of the first adult sheep, Dolly, the idea of cloning has become a major issue and the subject of many debates. Many people are afraid of the idea of cloning because it is new and misunderstood. There is the notion that a clone would not be the same as any other person, but a clone is just a normal person, created with and having the same genes as the person being cloned. A clone will not be exactly the same as the original person. Because they will not have the same environment and experiences as the person from which they were cloned, a clone is more like a younger identical twin with a personality all of its own. There are also differences in mitochondria and uterine that makes the person different.

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The Effect of Temperature on Reaction Time

The Effect of Temperature on Reaction Time
Investigation I was given the task too investigate how the temperature (heat) can effect the reaction time of two chemicals. The two chemicals that I am going to use throughout my investigation are: Ÿ Sodium Thiosulphate Solution which are colourless crystals. Ÿ Hydrochloric Acid which is a colourless substance. Sodium Thiosulphate + Hydrochloric Acid Na2S2O3 +2HCl The only part of my investigation that I shall change during this experiment is the temperature. Everything else that I shall be doing during the investigation shall be kept exactly the same. Things such as: Ÿ The units of time that it takes for two chemicals to react and form a compound. Ÿ The units of measurement that I shall use to pour out the chemicals, cm3 or g/l (grams per litre). Ÿ I shall use the same amount of chemicals during each experiment, to make it a fair test. In order for my findings to be valid the experiment must be a fair one. I will use the same standard each time for judging when the X has disappeared. I will make sure that the measuring cylinders for the Hydrochloric Acid and Thiosulphate will not be mixed up. The amount of Hydrochloric Acid will be 15 cm3 each time, and the amount of Thiosulphate will be fixed at 20 cm3. During the heating stage of the experiment, a water bath will be used to heat up the acid and thiosulphate to the necessary temperature (the water bath will be heated up in units of 5/oC, as this is known to be the most effective and accurate way of reaching an exact temperature.

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The Effect of Changing Concentration of Salt Solutions on Osmosis in a Potato Chip

The Effect of Changing Concentration of Salt Solutions on Osmosis in a Potato Chip
Aim: To investigate how changing the concentration of salt solutions affects osmosis in a potato chip. Hypothesis: === Increasing the concentration of salt in a solution increases the amount of osmosis occurring. Theory Behind the Experiment: Dictionary Definition of Osmosis: Diffusion of fluid through a semi-permeable membrane. Osmosis will occur from a high concentration to a low concentration. It usually involves the movement of water, but can also involve the movement of sugars and salts. Osmosis will change a cell?s shape, whether it is Flaccid, or Turgid. A flaccid cell will usually gain water through osmosis, and a turgid cell will probably lose water. Equipment Needed: ===== Boiling Tubes (5) Ruler Salt Solutions (4 Different) 600 ML Beaker Weighing Scales Distilled Water Bread Knife Thermometer Measuring Cylinder Glass Rod Potato Chips (15 equal) Core Borer White Tile Method:

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Tropical Rain Forest Desert

Tropical Rain Forest Desert
B ? Biomass P ? Precipitation L ? Litter W ? Weathering S ? Soil Ro ? Run off The rainforest is an energetic ecosystem. This means that the rainforest vegetation grows quickly and when dead, decomposes extremely quickly. This is why the tropical rainforest spider diagram looks the way it does. The amount of nutrients in which the rainforest litter (dead leaves, bark, trees, plants etc) store holds is quite small reason being is that when it falls to the ground because of the energetic ecosystem it decomposes quickly into the soil therefore the litter gives nutrients to the soil and this is why the soil has more nutrients in its structure (this is shown by it having a larger circle). There are not really any seasons in the rainforest; leaves fall all year round and therefore can?t fall in mass. Precipitation occurs frequently in the rainforest and it passes nutrients onto litter. Precipitation is mechanical and therefore the relative time of which nutrients pass onto the store of litter is quite fast

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An Investigation into Electrolysis - Copper Sulphate

An Investigation into Electrolysis - Copper Sulphate
Introduction Decomposition caused by electricity is called electrolysis. The electrical energy causes a chemical change. When a salt is dissolved in water, its ions become free to move so the solution can be ?electrolyzed.? The products of the electrolysis depend on the chemical solution, its strength and the type of electrode. The cathode is negatively charged and therefore attracts to it positive ions. E.g. hydrogen. The more reactive substance stays in the solution whereas the less reactive is released and appears as a gas (hydrogen) or a coating of metal. At the anode (positively charged) the negative charges are given up; for example chlorine or oxygen ions become elements. Electrolysis is used to produce gases or purify metals. plan Aim: To find out if the current being transferred through copper sulphate affects the amount of copper transferred.

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The Composition of Milk

The Composition of Milk
The Composition of Milk Introduction Milk is composed of water, carbohydrates, fats, proteins, minerals and vitamins. While each component is viewed as separate, milk is secreted as a complex mixture of these components. The properties and importance of milk to humans is varied by the percentage compositions of these components, and milk is often manipulated in order to make it more useful for humans. Aim The main aim of our experiment was to identify the different compositions of milk, and to find out what properties these components have. The main components that we aimed to identify were:
Proteins
Sugars
Fats

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An Investigation to Show the Effect of Temperature on Daphnia

An Investigation to Show the Effect of Temperature on Daphnia
An Investigation to Show the Effect of Temperature on Daphnia Plan: I will submerge some daphnia contained in a test tube in water of differing temperatures and measure their subsequent heart rates. Hypothesis I think that the heart rate of the daphnia will increase up until around 40ËšC at which point most of the daphnia?s enzymes will have denatured and rate of metabolism will have stopped or decreased sufficiently to have stopped the daphnia?s heart rate. Apparatus list Test tube Beaker Different temperatures of water Daphnia Pipette Stop clock Microscope Slide Safety Follow usual lab safety rules. There are no major safety considerations in this experiment as the daphnia aren?t harmful and water above 40ËšC will not be used. Method To determine if temperature does have an effect on the daphnia, I intend to carry out the following experiment.

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Choosing to Be a Vegetarian

Choosing to Be a Vegetarian
Choosing to Be a Vegetarian I have decided to talk about vegetarianism and why people decide to
live their lives in this way. I have found a number of good reasons
for people choosing this way of life.

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Speech on Water Fluoridation in Washington State

Speech on Water Fluoridation in Washington State
1.statement OF the problem: Washington State has a current public policy on the issue of fluoridation, which is too general a statement to unite the state and its population on the issue. This situation was witnessed recently when the city of East Wenatchee was split in its opinion on the issue. Situations such as these are occurring all over the state of Washington. Washington needs a sound public policy that unites the entire population of Washington. The purpose of this paper is to debate the arguments of both for and against, and create a public policy that can unite the state of Washington

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The Dangers of Genetic Engineering in Food Products

The Dangers of Genetic Engineering in Food Products
A whooping 60% of what?s on our supermarket shelves may contain genetically engineered soya. Some 3000 genetically engineered foods are lined up for approval. How should genetically engineered (GE) foods be regulated? Foremost, we must clarify what genetic engineering is? laboratory technique used by scientists to change the dna of living organisms. dna is the blueprint for the individuality of an organism. The organism relies upon the information stored in its dna for the management of every biochemical process. The life, growth and unique features of the organism depend on its dna. Genes are the segments of dna, which have been associated with certain functions of an organism. Molecular biologists have discovered many enzymes, which change the structure of dna in living organisms. Some of these enzymes can cut and join strands of dna. Using such enzymes, scientists learned to cut specific genes from dna and to build customized dna using these genes. They also learned about strands of DNA?viruses? which can infect a cell and insert themselves into its dna, so, scientists started to build viruses which made genes of their choosing and used the new viruses to insert these genes into the dna of living organisms. Genetic engineers believe they can improve the foods we eat by doing this. For example, tomatoes are sensitive to frost, which shortens their growing season. Fish, on the other hand, survive in very cold water. Scientists identified a particular gene, which enables a flounder to resist cold, and used the technology of genetic engineering to insert this ?anti-freeze? gene into a tomato. This makes it possible to extend the growing season of the tomato. A lot of food that we eat today contains genetically modified ingredients and usually without our knowledge. The biggest experiment in human history has begun, with us as the guinea pigs and the planets ecological system as the test site. The argument is not whether or not it should be allowed but how it should be regulated.

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