Experiment 621a Essay

The protein molecules in many foods provide the amino acid building blocks required by our own cells to produce new proteins. To determine whether a sample contains protein, a reagent called Biuret solution is used. Biuret solution contains copper ions. However, the chemical state of the copper ions in Biuret solution causes them to form a chemical complex with the peptide bonds between amino acids (when present), changing the color of the solution. Biuret solution is normally blue, but changes to pink when short peptides are present and to violet when long polypeptides are present.

3. Experiment: Use the Gizmo to find the carrying capacity with Ample, Moderate, and Little land. List the carrying capacities below.

What observations can you make regarding the gene pool and gene frequency of the surviving individuals?

a. Change the 24th bead to a different color. What does the sentence say now (re-read the entire sentence)? Does the sentence still make sense?

1. Develop hypotheses predicting the effect of pyrite and coal on the acidity of water?

1. During gym class, four students decided to see if they could beat the norm of 45 sit‐ups in a minute. The first student did 64 sit‐ups, the second did 69, the third did 65, and the fourth did 67.

Students will carefully observe acts of aggression and prosocial behavior on television, report their observations, and analyze their data to draw conclusions.

This experiment will test the hypothesis that there is no difference between Core Biology students who meet outside of class to study and Core Biology students who do all of their studying on their own in terms of grades.

In order to conduct this experiment, a hypothesis had to be made on what would happen to the egg when it is placed in water and the question was answered by saying that it would alter in shape because of osmosis. Osmosis is when water moves from an area of lower solute concentration to an area of higher solute concentration. Then after making our hypothesis, the experiment was started by grabbing the egg from the bucket of vinegar with our hands. Second, the egg had to be taken to the sink and gently rubbing the egg with the pad of our thumb to clear off the outside, while the water was poured over it. Third, the mass of the egg had to be recorded , which was our initial mass, by putting it on the mass scale. Fourth, a cup was filled with water

Summary: The article was mainly about the effects priming can have on an individual. The article thoroughly explains how thinking about a behavior, primes a person to engage in the same behavior they were just thinking about. The author describes this as an automatic effect, claiming we conduct certain behaviors unintentionally, using experiments to convey that behavior and attitude are automatic. The example used in the article to back up the author’s claim is stereotyping. The author believes individuals naturally stereotype, which ultimately has an effect on their behavior.

The most important part of the experiment was not whether the hypothesis was correct, but it was what I gained from the project. As I progressed with my experiment, I learned many things. My knowledge of the Bay Laurel, Laurus nobilis, plant expanded greatly. I learned that the Bay laurel was a large shrub with green and glossy

The purpose of experiment 1 and 2 was to use AirTrack equipment to experimentally verify Newton’s Second Law in a friction-free environment and to analyze the energy transformation and conservation when a conservation force does work on an object within a system. The lab method that allowed us to achieve the lab purpose was using the experimental values obtained from using AirTrack and comparing it to the theoretical values obtained. The purpose of these courses two courses is that, the first experiment a constant net force but not constant mass as we added 0.100kg to the glider each run. The second mass had constant masses as we transferred 0.010 g to each glider. From table 1 you can examine that as mass increases, the acceleration. There are examples

Urey –Miller Experiment Description of the Urey-Miller Experiment In 1953 Urey and Miller were working at a university of Chicago, directed an experiment which would alternate the method of scientific investigation into the origin of life. Urey and Miller used very basic apparatus to conduct this experiment, they used: • 2 conical flasks • glass tubing • Power supply • methane (CH4) • ammonia (NH3) • hydrogen (H2) • water (H2O) Urey and Miller gathered a closed system which he pumped a mixture of gases that were methane, ammonia and hydrogen. One of the conical flasks was half full of boiling in order to add water vapour to the mixture and the gases were circulated around the apparatus. The gases mixed together created a high voltage electrical spark and then passed through a condenser to cool it down before going through a “trap” cooled in ice to collect any liquid products.

The universal messages being portrayed in this chapter is discovering the fundamentals of scientific research and what to do with data. The importance of this chapter shows past examples of experiments. These social experiments such as the Clever Hans experiment could give examples on what a fact, theory, and a hypothesis. The information in the chapter

Turning to the institutionalization of biology, the term ‘biology’ came to be employed rather self-consciously in some quarters around the turn of this century for experimental biology. The insistence on experiment was used to help legitimize a series of new sciences, genetics among them, as distinct from natural history, botany, zoology, systematics, paleontology, and speculative Darwinian evolutionism. Part of the point of excluding these old-fashioned sciences was that they did not have adequate means of testing explanatory hypotheses or, worse yet, they did not even offer genuine explanatory hypotheses. One aspect of the movement toward experimental biology was the physics-envy of biologists and their long struggle of biology to demonstrate