Download Levels of organization

DO NOW
 Hand in Balance Lab
 Take out textbook, turn to page 26
LEVELS OF ORGANIZATION
CHAPTER 1.3
ORGANISMS CAN BE CLASSIFIED BY THEIR CELL TYPE
 A domain is a broad category of living things based on
characteristics of their cells. Three domains:
1. Archaea: Prokaryotic organisms living in extreme environments.
2. Bacteria: Prokaryotic organisms
3. Eukarya: All eukaryotic organisms (plants, animals, fungi,
protists)
CELLS IN MULTICELLULAR ORGANISMS SPECIALIZE
 Specialization: specific cells perform specific functions
 A single cell from a multicellular organism CANNOT survive
on its own
 Example: A nerve cell
A MULTICELLULAR ORGANISM IS A COMMUNITY OF CELLS
 In more complex organisms:
 Cells are specialized and grouped together
 Tissue: a group of similar cells that are organized to do a specific job
 Organ: different tissues working together to perform a particular
function
 Organ System: different organs and tissues working together
 Humans have 11 major organ systems
 Organism: highest level of organization
NOW:
Complete the multiple choice questions in
the textbook, pg 35
HW: Complete the study guide
vocabulary column 1
HW: COMPLETE THE STUDY GUIDE VOCABULARY COLUMN 1
Column 1 