Lab midterm bio 181 GCU QUESTIONS WITH COMPLETE SOLUTIONS

Hypothesis correct answer: Tentative answer to a well framed question- an explanation on trial. Must be testable and falsifiable. Hypothesis must lead to prediction. It is a rational set of observations. Dependent variable correct answer: A factor that is measured in the experiment. Independent variable correct answer: Manipulated variable. Control group correct answer: Group controlled in the experiment Experimental group correct answer: Something that sets this group different from control group Theory correct answer: Much broader in scope than hypothesis and is a general spin off a specific hypothesis Do observations raise multiple hypothesis correct answer: Yes Potato lab: what concentration had the highest and lowest change in weight? correct answer: Ptto: with 50% sugar concentration increased .72 grams. Ptto: with 5%sug. Con. Lost .11 grams. Highest and lowest change in size? correct answer: Potato with no sugar grew the most. The potato with 5% s.c. Lost .00001 Relationship between sugar concentration and weight change? correct answer: Sugar causes potato slice to gain weight, but not too much. The sugar causes the potato to gain weight and absorb water slower. Relationship between sugar concentration and size change? correct answer: It doesn't really correlate and make a huge difference in size. Dependent variable for lab: correct answer: Potato Independent variable for lab correct answer: Sugar How many paramecium can be occupied in 20% of field of view and 10mm at 40x magnification? correct answer: .2x10= 2 paramecium Power of lens: correct answer: 4x, 10x, 40x, 100x Magnification correct answer: 40,100,400,1000 Diameter(mm) correct answer: 4.5,1.8,.45,.18