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

2. B. Multicellular organisms 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 organOrgan system