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The effects of early feeding experiences on later food preferences were studied in guinea pigs. The animals were grouped five per cage, and each of the three groups was fed only one type of food-A, B, or C-for three weeks. Then they were tested individually to determine their food preference in a cafeteria-style situation, with all three foods present. What principles of experimental design and methodology have been violated in conducting this experiment?
Assume you have a stock solution with a concentration of 722g/L. You want to make one liter of solution with a concentration of 39g/L.
A set of monohybrid crosses is like those done by Mendel. Three-fourths of the F2 plants have purple-flowers and the rest have white-flowers. If a purple plant is picked at random and selfed, what is the probability that only purple-flowered plant..
Which of the following statements about deuterostomes is false.
How do the electron acceptors used in fermentation differ from the terminal electron acceptors used during aerobic respiration and anaerobic respiration?
Which region of the brain has changed the most during the course of vertebrate evolution? Why do you think this is so?
A 35-year old man with Down's syndrome dies of acute lymphoblastic leukemia. Gross examination of the patien,s brain at autopsy shows mild microcephaly and underdevelopment of the superior temporal gyri. Histologic examination would most likely sh..
Explain the structures the dye passed through in order to get there and discuss and define the term transpiration-pull.
Genes a and b are 20 cM apart. An a+b+/a+b+ individual was mated with an ab/ab individual. diagram the cross and show the gametes produced by each parent and the genotype of the F1.
NASA hopes they may one day be useful in producing some electricity on a spacecraft. What mode of nutrition do these bacteria most likely use.
A young man was brought to the hospital suffering an unknown disease. Unfortunately, the young patient did not make it. Upon examination of his liver cells it was determined that the liver cells were extremely unhealthy.
Earlier in 2010, the Pacific island nation of Samoa decided to switch from driving on the right to driving on the left. Why may these cause difficulties? Why is it complicated for a cell to change codon usage, say, switching a "stop" codon to a trypt..
The branching gastro vascular cavity of cnidarian and Platyhelminthes: Do these animals have distinct boundary organs? Compare and contrast the basic body plan of these animals? How does the fluid "circulate" without one or more pumps? Explain why..
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