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Applying the Scientific Method
Attention deficit disorder (ADD) is a syndrome in which a person has difficulty focusing sustained attention on a task for a significant amount of time. In some cases this is accompanied by hyperactivity as well. It is currently being diagnosed at an all time high. Between 1989 and 1996, youth visits for ADD increased 90%, from 1.9% of total physician visits to 3.6%.Now a psychiatrist, Dr. Edward Hallowell is making a new distinction. He has described a similar set of characteristics in a large number of patients that he terms Attention Deficit Trait (ADT). It looks a lot like ADD in its day to day manifestation, but unlike ADD, ADT symptoms lessen when the sufferer goes on vacation or into a decreased sensory input setting for an extended time period (on the order of days or weeks). In such a long-term placid situation, the ADD sufferer's problems continue unabated.We will pretend (assume?!) that you have the general set of symptoms described above. You'd like to know which of these two problems you have: the disorder (ADD) or the trait (ADT). We’ll approach your problem using scientific methodology—developing a question, an hypothesis, an experiment, and a control for the experiment. Let’s share this assignment. I will supply both the initial question and the experiment we’ll perform on you. Your job is to state the hypothesis and to design the most important and most basic control for this experiment:Your Question: What's my problem? Is it ADD or is it ADT?(1)Your Hypothesis:Your Experiment: Keeping your same diet, sleep habits, and basic activity level, you will be sent on a two week vacation to the Bahama Islands where you will be given only a beach to walk and your favorite friend to talk to, following which you will be asked to read and memorize 10 sequential definitions from a standard dictionary in 30 minutes’ time.(2) Your Control for this Experiment:Your assignment:1) Write out a testable hypothesis in a brief sentence. Derive it from the question posed above. (Be certain that the experiment addresses it!)2) In a second sentence describe a basic, critical control situation (additional experiment?) that will give validity to the experiment described above.Number your sentences: 1 and 2; do not use paragraph form.
an enzyme lab you will do later this term measures production of yellow colored nitrophenol over time. what range of
What is the significance of the fact that histones are extermely conserved?
Histones are proteins found in the nucleus tightly bound to DNA, Determine which has many phosphate groups. The pl of histones is very high, about 10.8.
Assume you work with petunias and you have identified a single gene that causes their flowers to either be all pigmented (solid), or streaked with white.
Critically discuss three of the test systems used to study the effects of a toxicant on chromosomes, describe each test system, and discuss one advantage or disadvantage of that particular test system.
choose one of the disorders you read about in this unit such as fragile x syndrome adhd turners syndrome down syndrome
What is evolutionary importance of cyanobacteria? Describe how cyanobacteria affected life on earth.
create a specific experiment to measure the rate of cellular respiration in an organism of your choice
Think about the following two unlinked genes in the poisonous plant, Jimson Weed. The dominant allele V produces violet petals while the recessive allele v produces white petals.
Suppose you could selectively prevent production of a-amylase or oligo-1,6-glucosidase in an organism that normally hydrolyzes starch. Which enzyme would the organism miss the most?
What is the selective advantage of producing thousands of vessels and tracheids instead of one giant conduit for water transport?
A F1 AB/ab (coupling) was test-crossed. A progeny of 1000 individuals had the following phenotypes: 370 AB, 370 ab, 130 Ab, 130 aB. What is the distance in map units between genes A and B.
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