Life Science OGT

1. Life Science OGT Benchmarks A, B, & D

2. Benchmark A • Living cells are composed of a small number of key chemical elements which include: • Carbon • Hydrogen • Oxygen • Nitrogen • Phosphorus • Sulfur • Living cells are the basic unit of structure and function of all living things

3. The Cell

4. Living cells come from pre-existing cells after life originated • Living cells are different from viruses • A cell has specialized structures called organelles which include but are not limited to: • Nucleus • Chromosome • Mitochondria • Cell membrane • Cell wall • Chloroplast • Cilia • Flagella

6. Parts of the cell

7. Benchmark B • Cellular processes which indicate the characteristics of life include: • Homeostasis • Energy transfers & transformations • Disposal of wastes • Synthesis of new molecules • Cells divide through mitosis and meiosis • Cells are specialized to perform specific functions • Multicellular organisms are formed as highly organized arrangements of differentiated cells

8. Mitosis

9. Benchmark D • Cells and organisms acquire and release energy through: • Photosynthesis • Chemosynthesis • Cellular respiration • Fermentation • Living organisms use matter and energy to synthesize a variety of organic molecules such as proteins, carbohydrates, lipids, and nucleic acids to drive life processes such as growth, reacting to the environment, reproduction and movement

10. Photosynthesis

13. Cellular Respiration