IB Biology 1.1 Latest Version with Complete Solutions

IB Biology 1.1 Latest Version with Complete Solutions Cell Theory 1. All living things are composed of cells and cell products 2. New cells are formed only by the division of pre-existing cells 3. The cell contains inherited information that are used as instructions for growth, functioning, and development 4. The cell is the functioning unit of life; all chemical reactions of life take place within cells 7 functions of life: 1. Nutrition 2. Metabolism 3. Growth 4. Response to Stimuli 5. Excretion 6. Homeostasis 7. Reproduction Nutrition (as a function of life) The process by which living things take in materials from its environment for growth and repair Metabolism (as a function of life) Chemical reactions inside the cell, including cell respiration to release energy Growth (as a function of life) Cells increase in size over time. When they are large enough and acquire the materials required they may divide Response (as a function of life) The ability to react to changes in the environment. Receptors in the plasma membrane detect molecules in the environment and send signals to the internal machinery of the cell Excretion (as a function of life) The process by which living things remove waste products produced by the cell's activities Homeostasis (as a function of life) Cells maintain a stable internal environment by carrying out a continuous series of chemical reactions Reproduction (as a function of life) Producing offspring either sexually or asexually Why is the SA to V ratio of a cell important in the limitation of a cell size? If a cell grew infinitely large it would reach a point where this balance between SA and V become imbalanced, meaning it used substances more quickly than it could obtain them. At this point cellular activity decrease and/or ceases. What arises from the interaction of component parts of a cell? Emergent Properties How can it be that all of an organism's