1. Days to repair As we know, the number of days in which the copier can be repaired is random. So, we will generate some random numbers between 0 and 1 and denote it by r1 then according to the given probability distribution: If 0 < r1 < 0.2, then it will take one day to repair the copier. If 0.2 < r1 < 0.65, then it will take two days to repair the copier. If 0.65 < r1 < 0.90, then it will take three days to repair the copier.
Chose only one variable to manipulate. ✓ Click done ✓ Make sure that the only change that is displayed is the beak size on Wallace Island. ✓ Click on “Run Experiment” located under the “years” bar. ✓ Examine your field notes for variances in your dependent and independent variables. ✓ Check for population growth or decline every 10 years and record your findings for closer comparisons.
Together, the alleles determine the offspring’s genotype. Determine the phenotype for that offspring. Repeat a total of ten times, once for each of the ten offspring. Keep track of your results in your lab notebook. b) In the data table, record the tally for each phenotype in the row marked “Simulated Number.” c) In the row marked “Simulated Percentages,” convert the simulated numbers (out of 10) to simulated percentages (out of 100%).
The food concentration affects the yeast activity because in each tube there were different amounts of water and molasseses so that make the yeast react different. 2. The experiment help students to write a better lab report with more information 3. It helps the students to practice their measuring skill when they were measuring the gas in the smaller test tubes. 4.
Abstract The purpose of this experiment was to investigate if Artemia salina is a good bioindicator for toxins in their environment used to detect pollution. Brine shrimp have a high tolerance for changes in their environment. Shrimp were exposed to varying concentrations of ethanol to test their tolerance level and determine the viability for the crustaceans. Four petri dishes of each concentration were used, as well as four dishes of a control that only contained brine water. Three hundred brine shrimp were placed in each petri dish for each of the controls and ethanol concentrations.
The experimental group will receive the Protazen and the control group will receive a placebo. A placebo is an inert substance and it is used in order to find out whether or not the effect of the independent variable actually includes what the experimenter is testing. In this experiment the placebo will be a sugar pill. Each experiment has a control in order to account for the placebo effect. The placebo effect suggests that the effects produced by a drug might be related to psychological processes as a test subject may still improve because of their expectation to do so.
Research has been done by Silverstein et al in which it was found that biological factors may influence a person’s first positive or negative experience with their first cigarette. For example whether they feel nausea, or choke. Although this does not explain why a person initially picks up a cigarette it does give us an explanation for why some people continue the initiation of smoking. Those with worse experiences due to the biological factors may be less likely to continue to start smoking. Hall et al also suggests that nicotine addiction is likely to involve multiple forms of genes that each have a small effect that interacts with each other and environmental factors.
The genetic factors can be subdivided into mutations and chromosomal activity during sexual reproduction. Genes, the basic unit of inheritance, are lengths of DNA that code for a specific protein or RNA molecule. A mutation is a change to the nucleotide sequence of DNA which frequently causes a gene to code for a different or non-functional protein (Campbell et al. 2005). This often results in a change in the characteristics of an organism.
Natural Selection Paper A. Natural selection scenario Essay When we talk about natural selection, we will think about mutation, genetic variation, and differential reproductive success etc. Mutation is meaning the change of genome orders that make the species change. Genetic variation means the change of alleles inside the genes, this change happens over time, is very important for Natural selection, because is the starting point of natural selection. We will also consider about differential reproductive success for natural selection.
Population Ecology: Mark-Recapture of Sow Bugs Population ecology is the study of how a species population change over time and how they interact within their environment. Population ecologists study the interaction of organisms within their environment by evaluating properties of populations. Such properties studied are population growth, and population structure. One reason they study this is to determine how many individuals make up the population, and how much the population changes over a certain time. (“Estimating the Size”) There are various techniques population ecologists use to test a population size such as Quadrant sampling, Transect test, and mark-recapture test.