BIO 181 North Carolina State University -BIO-181 Midterm Exam fully solved

BIO-181 Midterm ExamKnow variables in an Experiment (dependent vs. independent variables) - correct answer independent variable is the variable you change to see how it will affect the dependent variable. & a dependent variable is the variable that changes as a result of changes in the other variables like the independent variable Know the five steps in the scientific method - correct answer 1)state the problem 2)hypothesis 3)design experiment 4)record and analyze data 5)conclusion difference between hypothesis and theory - correct answer a theory is a conclusion after many, many experiments, while a hypothesis is an idea about what is going to happen before an experiment starts know how to calculate total magnification - correct answer Ocular lens magnification = 10X Objective lens magnification being used = 4X Total magnification? Calculation: (10X)(4X) = 40X Total Magnification Know how to estimate size of an organism - correct answer field of view is 450 The actual length of the critter is 450 µm / 4.5 = 100 µm. Know all parts of a compound microscope - correct answer Know what macromolecules and their classes are - correct answer Nucleic Acids:DNA & RNA; molecules that enable living organisms to reproduce genetic information from one generation to the next