Post on 20-Jan-2018
description
NOTES 1-3
Studying Life
What is Biology? “Bios” = life “Ology” = the study of something
Biology = study the of life
Biologists = people who study biology
Study interactions in environment, study problems and propose solutions
Characteristics of Life No single characteristic is enough to
describe a living thing. Also, some nonliving things share one or
more traits with living things. Example = mechanical toys, cars, and clouds
move around. Despite these difficulties, it is possible to
describe what most living things have in common
Characteristics of Life Continued
Living things share these characteristics: Living things are made up of cells (unicellular
vs. multicellular) Reproduction Based on a universal genetic code Growth & Development Response to stimuli Homeostasis– regulation of internal
environment Use materials & energy Change over time or Adapt
Levels of Organization Living things may be studied on many
different levels. The levels are (from the smallest group to the
largest group): Molecules Cells Groups of cells (tissues, organs, & organ systems) Organism (individual living thing) Population (group of one type of organism) Community (Populations that live together in one
area) Ecosystem (Living & nonliving things in an area) Biosphere (Part of the Earth that contains all
ecosystems)