BIOL 141 - UMBC| 81 Question with complete solution graded A+

Difference between a hypothesis and scientific theory? - Hypothesis - testable statement to explain a phenomenon Scientific Theory -well-substantiated explanation of some aspect of the natural world, based on knowledge that has been repeatedly confirmed through observation and experimentation Hypothesis and prediction? - Prediction describes a measurable or observable result that must be true if hypothesis is valid What kinds of hypotheses are useful for scientific investigations that try to explain the natural world? - a testable and directional hypothesis ...which are not useful? - A hypothesis is not useful if it cannot be tested or proved Example of scientifically useful hypothesis - if you add glucose to the apoenzyme, it will become active Example of not useful scientific hypothesis - if you land on mars you will grow wings 2 components of cell theory? - 1. all organisms are made of cells 2. all cells come from pre-existing cells 2 components of theory of evolution by natural selection? - 1. traits have to heritable 2. heritable traits had to vary and help the individuals survive 2 conditions required by the process component of evolutionary theory? - 1. all species are related by common ancestry al selection theory or 'descent with modification'Spontaneous Generation Hypothesis - states that cells arise spontaneously under certain conditions, such as from non-living material How did Cell theory change SG hypothesis? - Cell theory challenged SG hypothesis by stating that Cells could only come from preexisting cells For both flasks in the Pasteur experiment, what is the outcome predicted by Spontaneous Generation? - that even though he boiled the broth and removed any cells, cells should still spontaneously generate and grow