1. 7.3 From Cell To Organism I. Diversity in Cells A. ____________ Cells
1. Always ________
2. Limited in _____
3. Lack ________ & membrane bound ________
4. Vary in cell wall _________ & ability to _____
a. many have a __________
b. _________ – long thread-like structure that rotate quickly to move an organism
c. ______ – short, thick outgrowths that allow attachment to surfaces or other cells

2. B. _____________ Cells
1. ________ in size
2. Can be_________ or ____________
3. Examples – _______ & ______ cells
a. Both have same _____________
b. Plant cells also have __________, a large central ________, & a cell _______
4. Can become __________ in function
a. examples – ________ cells, _______ cells, _______ cells, etc.

3. II. Levels of Organization
1. A distinct group of cells that have similar _____________ & ______________
a. ex- __________tissue
B. _____________
1. A specialized structure with a specific ________ made up of many different ______
a. ex – the _____ - made up of muscle, nerve, & other tissues
C. _________ System
1. Various ________ that carry out a major ________ function
a. ex- __________ system – carries ______ throughout the body

4. III. _______ types
A. More than half the biomass on Earth is composed of _____________ organisms
B. ________ Groups
1. __________ organisms
a. cells that live as a _________ group but do not depend on each other for __________
i. ex.- ___________
C.. Multicellularity
1. Only occurs in _____________
2. Includes some __________, most ________, & all ________ & __________
3. Begin as only ______ cell & divide
4. Undergo _____________ – the process by which specialized functions are created