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Unit One Review Guide For Biology

Unit One Review Guide For Biology - Unit One Review Guide...

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Unit One Review Guide For Biology Chapter 1: Introduction to Life on Earth - Scientific Method: o Observation Statement of a given phenomena leading to a problem or question o Problem Also known as a question which leads to a hypothesis answering the problem o Hypothesis An educated guess based on observations that is offered as an answer to a question and an explanation for a problem o Experiment Tests the validity of the hypothesis o Data Observations collected from the experiment o Conclusion States the validity of the hypothesis o Variable Factor within an experiment that test the assertion of an observation o Hypothesis vs. theory Hypothesis Little support not proven
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Theory Well proven Much more general and reliable than a hypothesis Aka principle or natural law o Experimental group vs. control group Experimental group Testing different variables within a given experiment Variables are being changed Control group Variables remain constant Used as a standard to view differences throughout experiment o Theory of evolution Explains that modern organisms descended with modification from preexisting life forms Evolution arises from three natural process Genetic variation among members of a population owing to differences in their DNA Inheritance of those variations by offspring of parents who carry the variation Natural selection-the enhanced reproduction of organisms with variations that help them cope with their environment o Characteristics of living things All living things are composed of cells Cells combine to form tissue
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o Tissue composes organs Organs compose organ systems All living things information are held in deoxyribonucleic acid (DNA) An organism’s DNA is held in chromosomes in each cell o Chromosomes- are the cell’s genetic blueprint or molecular instruction manual A guide to the construction and operation of its body Respond to their surroundings Other living things Environmental factors Homeostasis Maintain constant, favorable internal controls o Temperature o Moisture Metabolize Utilize energy and nutrients for cell reactions o Autotrophs: make their own food (photosynthesis) o Heterotroph: cannot make own food, must eat animals
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