1. IV. The Diversity of Cellular Life
A. Unicellular Organisms --Single-celled Organisms that do all a living thing would ----They dominate life on earth in terms of numbers

2. B. Multicellular organisms
Made up of many cells
Depend on communication and cooperation between specialized cells
---_______________-cells throughout organism can develop in different ways to perform different tasks
Cell specialization

3. 1. Specialized animal cells
eg. Red blood cells equipped to carry oxygen ;cells specialized to produce proteins produced in pancreas(have many ribosomes and rough ER);muscle cells have actin and myosin cytoskeleton elements for contraction
2. Specialized Plant cells
______________________-are tiny openings on underside of leaves and exchange gases
_____________________-regulate gaseous exchanges in stomata,changing shape due to plant’s internal conditions
stomata
Guard cells

5. C. Levels of Organization
1. individual cells
2. _____________________-group of similar cells w/ particular function
3. ______________-group of tissues working together
4. ______________-group of organs working together for particular function
tissue
organ
Organ system