Biology The Study of Life

Characteristics of Living Things Made up of one or more Cells Reproduces Displays Organization (DNA) Grows & Develops Requires Energy Responds to Stimuli Maintains Homeostasis Changes over time

Homeostasis – process by which organisms maintain a stable internal environment Biology is STRUCTURE related to FUNCTION. Biology means the “study of life”

6 Kingdoms of Life Animalia Plantae Fungi Protista Eubacteria Archaebacteria

Kingdom Animalia – made up of many cells, cannot make their own food, no cell walls Kingdom Plantae – made up of many cells, makes their own food through photosynthesis, has cell walls Fungi – made up of many cells, cannot make their own food, has cell walls, external digestion

Kingdom Protista (misfit kingdom) – mostly made up of one cell, some can make their own food, some consume, some can do both Kingdom Eubacteria – one celled, helpful & harmful to humans Kingdom Archaebacteria – one celled, live in extreme environments

Where do viruses fit in? Considered NOT living Are not made up of cells Cannot reproduce on their own

Characteristics of Life Videos What is a Sand Dollar?

Etymology Biology: bio- (life) + -logy (the study of) Homeostasis: homeo- (Gk. HOMO, same) + -stasis (standing still)