A. B. Explain the role of cell organelles for both prokaryotic and eukaryotic cells, including the cell membrane, in maintaining homeostasis and cell reproduction. Explain how enzymes function as catalysts. A. B. Identify the function of the four major macromolecules (i.e., carbohydrates, proteins, lipids, nucleic acids). Explain the impact of water on the life processes (i.e., osmosis, diffusion). Make up tests (Guided Reading) Review new standards *Lunch Break Review test *Stretch Break Continue chapter 1 notes Element: a pure substance that consists entirely of one type of atom. Elements are represented by a one or two-letter symbol For Example: C = Carbon. It has the atomic # 6, meaning that each atom of carbon has 6 protons and 6 electrons. 1. Did you and your partner have similar ideas to begin with about leeches? 2. Does your partner think they are useful? Why or why not? 3. Did your partner support their ideas with information from the text? Buffers: weak acids or bases that can react with stronger acids or bases and __________ them to prevent sharp, sudden changes in pH that could be harmful.