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1. You are a writer for "Consumer Reports" magazine and you are asked to design an experiment to evaluate the effectiveness of three brands of whitening strips for teeth. Describe how you would do this using the scientific method. Include all of the steps, control group, experimental groups, and variables. 2. Your biology class is performing an osmosis experiment. You are given three identical stalks of celery and three salt solutions of varying solute amounts. The data table below compares the solute amount of the celery stalks to the solutions. Solute Amount of the SolutionWater Amount of the Solution Solution A less than the celery stalkmore water than the celery stalk Solution B same as the celery stalksame water as the celery stalk Solution C more than the celery stalk less water than the celery stalk a). Identify which solution is isotonic, hypertonic, or hypotonic to the celery stalk cells b). Describe what happens when the celery stalk is placed into each of the respective solution. 3. Dihybrid cross. The kernels (seeds) on an ear of corn are all offspring of one set of parents. There are 2 pairs of alleles on separate homologous chromosomes (purple or yellow kernels on one pair, plump or shrunken kernels on another). Yellow (Y) is dominant to purple (y) and plump (P) is dominant to shrunken (p). If the genotype of parent plants are YyPp and yyPp, what are the expected probabilities of the genotypes and phenotypes of the offspring kernels? Explain your reasoning. 4. A population of grasshoppers in the Kansas prairie has two color phenotypes, with 90% of the grasshoppers green and 10% brown. Typically in the last century, the prairie receives adequate rain to maintain healthy green grass, but for the last decade the prairie suffers a severe drought and is also invaded by a bird that eats grasshoppers. Briefly explain in terms of the four parts of natural selection listed below how the population of grasshoppers would be expected to change during the drought years. overproduction - variation - competition& survival - differential reproduction - 5. Describe an environmental problem that you feel is the most urgent worldwide. Which areas of the world are suffering the most from the problem? Propose a solution to the problem. 6. Describe three structures found in plant cells but not animal cells. Describe the function of each structure, and how each benefits plant cells but is not necessary for animal cells. 7. Explain why top carnivores, such as eagles and tigers, have low population densities in nature. Include processes of the energy pyramid (trophic levels) in your answer.\
In a population of rabbits, you find three different coat color phenotypes, chinchilla, himalaya, and albino. How man genes are involved in rabbit coat color. Briefly explain.
A doctor will give you an antibiotic to treat the bacterial infection, but you are given a vaccine to keep a virus (and some bacteria) from making you ill. What is the dissimilarity between these approaches.
In its native land, for every 50 orange vipers (Yy) found, 30 yellow vipers(YY), and 10 red vipers(yy) are found. determine the selection coefficient for each genotype and calculate the frequency of the two alleles.
Fill in the blanks to indicate the number of chromosomes in one cell of that stage and the numberof chromatids per chromosome in that stage.
q. 1. classify the superfund program. the superfund program is the federal governments program to locate and
a new non-invasive screening test is proposed that is claimed to be able to identify patients with impaired glucose
Directions for Research and Analysis: Find 5 sources that describe what specifically this product does in the human body. Think about what you are reading. Analyze pros and cons
Legal issues in health care include violation of patient privacy laws and regulations, such as the Health Insurance Portability and Accountability Act (HIPAA)
Explain why at very low and very high heart rates, the heart is unable to pump adequate amount of blood and explain the major mechanisms involved in regulation of cardiac performance.
ATP synthesis in chloroplasts is very similar to that in mitochondria: Electron transport is coupled to the formation of a proton (H+) gradient across a membrane.
Explain an experiment that would differentiate between simple diffusion and facilitated diffusion of glucose across the cell membrane of a new strain of bacteria.
The gene (cv) is recessive and is known to be 13.7 Map units from the beginning of the chromosome. The recessive gene (f) is 51.7 map units from the beginning of the chromosome.
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