Purruki Essay

Living organisms:

-are composed of cells

-are complex and ordered

-respond to their environment

-can grow and reproduce

-obtain and use energy

-maintain internal balance

-allow for evolutionary adaption

Levels of cellular organization: (menor-mayor)

atoms

                molecules

                                      organelles

                                                          cells

  Organism Level:

tissue

            organs

                            organ systems

                                                    organism

Carlos Lineo – clasifico todos los animales en la faz de la tierra

Population Level:

Population-> species->community->ecosystem->biosphere

Hierarchical organization – each level of organization builds on the level below it, but often demonstrates new features

Emergent properties – new properties presents at one level that are not seen in the previous level

Nature of science – science aims to understand the natural world through observations and reasoning. Science begins with observations, therefore much of science is purely descriptive

    - Science uses both inductive and deductive reasoning –

    - Deductive reasoning- uses general principles to make specific predictions

    - Inductive reasoning- uses specific observations to develop general conclusions

Scientific method (systematic approach to understand the natural world)

-observation

-hypothesis

-prediction

-experimentation

-conclusion

Reductionism- is to break a complex process down to its simpler parts

Models- to simulate phenomenon that are difficult to study directly

Scientific theory- is a body of interconnected concepts. Its supported by much experimental evidence and scientific reasoning. Expresses ideas of which we are most certain

Charles Darwin: served as naturalist on mapping expedition around coastal south Africa. Said that...