Biology Chapter 1 The Scope of Biology Biology

Biology Chapter 1 The Scope of Biology

Biology Explores Life (1. 1) n Biosphere n all the inhabitable parts of the planet n Ecosystems n a community consisting of living and non living things n Organisms n individual living things n Cells n basic units of life that make up organisms n DNA and genes n inheritance info

Biology Explores Diversity (1. 2) n Over 1. 5 million species (distinct form of life) discovered n 3 domains: 1) archaea 2) bacteria 3) eukarya

Archaea & Bacteria n Unicellular n Simple (no nuclei: prokaryotic cells)

Eukarya n All eukaryotic (have nuclei) n Divided into 4 subgroups n protists, fungi, plants and animals n Some unicellular (protists & fungi) n Some multicellular (protists, fungi, plants & animals)

Ch 2: The Science of Biology

n Data n The recorded info n Ex: A plant growth chart Two Types of Data n Quantitative data n Measurements, #’s n Qualitative data n Descriptions, observations

Observations vs Inference n Observation n Use of senses to gain information n Inference n Logical conclusion based on observation _____

Hypothesis and Scientific Method n One example of the Scientific Method: n Using Science attempts to explain a question using the scientific method n One key element is always there… n The HYPOTHESIS

Scientific Method: Forming and Testing a Hypothesis n Can it be tested? n Testable suggestion n Falsifiable – to answer a something that could scientific question prove a hypothesis is false n A wrong hypothesis is NOT a failure

n Eg: flashlight not working Pg. 31

Also needed in Science n Variable: n a condition that can differ within an experiment n Controlled Experiment: testing only ONE variable at a time n that variable is compared to the “control” n

Evidence in Science “ Biology Teacher REALLY an Alien!” n Evidence n Collected body of data from observations and experiments n Must be repeatable

The Limitation of Science n Need repeatable observations and testable hypothesizes n Ex: supernatural phenomenon n “A way of knowing” n Music you like n Right from wrong

Theories in Science n Theory n Well tested explanation, many, many observations n Can be changed based on new info n A hypothesis needs a lot of support to become a theory n Broader than a hypothesis

Science, Technology and Society asks questions Society n Goal of Science n Understand through observation and testing n Goal of Technology n Apply scientific understanding Ethical? n Who? n Why? n

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