Evolution determines the change in inherited traits over time to ensure survival. There are three variantsidentified as Variant 1 with high reproductive rate, eats fruits and seeds; Variant 2, thick fur, produces toxins;and Variant 3 with thick fur, fast and resistant to disease. These variants are found in a cool, wet, and soilenvironment. In time 0 years with cool and wet environment, the population is 50,000 with 10,000 Variant 1.15,000 Variant 2, and 25,000 of Variant 3. Two thousand years past, the environment remained the same withconstant average temperature and rainfall. A disease spread throughout the population. However thepopulation increased to 72,000. Calculate the population percentage of each variant in 0 years.

There are three variants identified as Variant 1, Variant 2 and Variant 3.In time 0 years, the…

Answered: Evolution determines the change in…

Algebra and Trigonometry (6th Edition)

6th Edition

ISBN:9780134463216

Author:Robert F. Blitzer

Publisher:Robert F. Blitzer

ChapterP: Prerequisites: Fundamental Concepts Of Algebra

Section: Chapter Questions

Problem 1MCCP: In Exercises 1-25, simplify the given expression or perform the indicated operation (and simplify,...

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Chapter 6, Section 3-HT, Exercise 175 Hormone Replacement TherapyThis exercise refers to a study on hormone replacement therapy. Until 2002, hormone replacement therapy (HRT), taking hormones to replace those the body no longer makes after menopause, was commonly prescribed to post-menopausal women. However, in 2002 the results of a large clinical trial1 were published, causing most doctors to stop prescribing it and most women to stop using it, impacting the health of millions of women around the world. In the experiment, 8506 women were randomized to take HRT and 8102 were randomized to take a placebo. Table 1 shows the observed counts for several conditions over the five years of the study. (Note: The planned duration was 8.5 years. The study was terminated as soon as HRT was shown to significantly increase risk (using a significance level of α=0.05), because at that point it was unethical to continue forcing women to take HRT).Does HRT influence the chance of a woman getting…
Ashlee Schenk and Tanya Blackburn conducted an experiment to study the effects of type of container (styrofoam, glass, plastic) and type of liquid (cola, water, juice) on the melting time (seconds) of an ice cube placed into the liquid. Five replications for each combination of container and liquid type were conducted. Because of time constraints the experiment had to be conducted over the course of 5 days with one replication of the 9 combinations on each day. On a given day melting of cubes was done one cube at a time as follows. A combination of the type of container and type of liquid was randomly selected. One cup of the liquid was poured into the selected container and then a randomly selected ice cube was added. The amount of time (mins) for the cube to melt was recorded and then this process was repeated until all combinations were done on the given day. This process was repeated on four other days (i) What are the two factors in the study? What is the response variable? (ii)…
Chapter 1, Section 1, Exercise 019 Trans-Generational Effects of EnvironmentWe ask whether experiences of parents can affect future children and describe a study that suggests the answer is yes. A second study, described in the same reference, shows similar effects. Young female mice were assigned to either live for two weeks in an enriched environment or not. Matching what has been seen in other similar experiments, the adult mice who had been exposed to an enriched environment were smarter (in the sense that they learned how to navigate mazes faster) than the mice that did not have that experience. The other interesting result, however, was that the offspring of the mice exposed to the enriched environment were also smarter than the offspring of the other mice, even though none of the offspring were exposed to an enriched environment themselves. One variable is whether or not the young female mice lived in an enriched environment and another variable is how fast the offspring…
A firm that operates a large, direct-to-consumer sales force would like to implement a system to monitor the progress of new agents. A key task for agents is to open new accounts; an account is a new customer to the business. To build such a system, the firm has been monitoring sales of new agents over the past 2 years. The response of interest is the profit to the firm (in dollars) of contracts sold by agents over their first year. Among the possible predictors of this performance is the number of new accounts developed by the agent during the first 3 months of work.
Can attack of a plant by one organism induce resistance to subsequent attack by a different organism? In a study of this question, individually potted cotton plants were randomly allocated to two groups. Each plant in one group received an infestation of spider mites; the other group were kept as controls. After 2 weeks the mites were removed, and all plants were inoculated with a fungus that causes wilt disease. According to the research question, H0: Miles do not induce resistance to wilt. Ha: Mites do induce resistance to wilt. What is the alternative hypothesis in symbols when p represents the proportion of wilt disease in a group? p1 < p2 or p1 > p2?
A student was interested in the impact of nutrition and exercise on mental health. She recruited a sample of 80 individuals. She divided the participants into 4 groups. One group was a control group. There was no treatment for this group. The second group was the diet group. These participants followed a strict diet that was designed by a dietitian. The nutrients in the diet were optimized for each individual. The third group was an exercise group. These participants worked with a personal trainer on an individualized exercise plan. The fourth group was the exercise and diet group. This group had both the dietitian and personal trainer intervention. After 3 weeks of treatment (or control), She measured their mental health with the Warwick-Edinburgh Mental Well-being Scale (WEMWBS). Some of the information is included in the ANOVA table below but I spilled a coffee on the output and the student already deleted the raw data...oh, no!! Given the ANOVA table below, what is the F-statistic?…
A cohort study is conducted to assess the association between hypertension and the risk of stroke. The study involves n=1,250 participants who are free of stroke at the study start. Each participant is assessed at study start (baseline) and every year thereafter for five years. The following table displays data on hypertension status measured at baseline and hypertension status measured two years later. 2 Years: Not Hypertensive 2 Years: Hypertensive Baseline: Not Hypertensive 850 148 Baseline: Hypertensive 45 207 Compute the cumulative incidence of hypertension over 2 years. Group of answer choices 17.1%
Avobenzone is one of the active ingredients in several commercially available sunscreens. It can be absorbed into the bloodstream when sunscreen is applied to the skin. The Food and Drug Administration has expressed concern about the safety of absorbing too much avobenzone. Researchers recruited 24 healthy volunteers to investigate avobenzone absorption for four different commercially available sunscreens: two sprays, a lotion, and a cream. Do the types of sunscreens (spray, lotion, and cream) differ in terms of how much avobenzone is absorbed into the blood? Subjects were randomly assigned to one of the four sunscreens, with six subjects for each. Subjects had 2 milligrams of sunscreen per 1 cm? applied to 75% of their body surface area (area outside of normal swimwear) four times per day for four days. The amount of avobenzone absorbed into the bloodstream (in nanograms per milliliter ap-plied, ng/mL) after 150 hours was then measured for each subject. For the purpose of analyzing…
In the city of AZ, there are two supermarkets, X-Mart and Y-Mart. It is assumed that every shopper makes a purchase once a week at one of these supermarkets (not both).In a study, 100 samples of shoppers were taken over 10 weeks. From the study, it is known that if a shopper goes to X-Mart in one week, 85 people will continue to shop at X-Mart in the following week, and if a shopper goes to Y-Mart in one week, 70 people will continue to shop at Y-Mart in the following week.Create a transition probability table and matrix for this scenario, and then If in the first week Ivankov buys from X-Mart, what is the probability that Terry will buy from X-Mart in the third and fourth weeks?
Question 7 Immuno-oncologists wanted to examine whether combination therapy with nivolumab and ipilimumab improved survival in melanoma patients compared to treatment with ipilimumab alone. They plan to first obtain approval from the institutional review board, identify melanoma patients, randomly assign some patients to combination therapy and others to treatment with ipilimumab alone, and follow these patients a certain period of time to record their survival. This study is an example of (Choose one from choices given): O None of the choices are correct O Experimental design (aka: interventional) O Non-Experimental design (aka: observational O Survey design
Thomas and Camille are international visiting scientists with research interests in horticultural and environmental issues in urban areas. They participate in various studies performed by Ville de Montréal. More specifically, they address issues related to plant diseases in city gardens, air and water quality, and food waste management. The viruses causing problems in strawberry plants are mainly spread by one insect, the strawberry aphid. Camille believes that as aphids feed on leaves, they transmit viruses that can cause a rapid decrease in plant growth. She decides to verify whether or not the number of strawberry aphids found on a plant could be linked to its growth. She therefore randomly chooses 5 strawberry plants at the same stage of development in a virus-infested garden. For each individual plant, she first collects all the aphids present on the plant and weighs them, and then weighs the entire plant to have a measure of plant growth. She obtains the following data.…
An agricultural field trial compares the yield of two varieties of corn. The researchers divide in half each of 8 fields of land in different locations and plant each corn variety in one half of each plot. After harvest, the yields are compared in bushels per acre at each location. The 8 differences (Variety A - Variety B) give x¯=3.07 and s=5.11. Does this sample provide evidence that Variety A had a higher yield than Variety B? (a) State the null and alternative hypotheses: (Type "mu" for the symbol μμ , e.g. mu > 1 for the mean is greater than 1, mu < 1 for the mean is less than 1, mu not = 1 for the mean is not equal to 1)H0 : Ha : (b) Find the test statistic, t = 7,6

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