| A | B |
|---|
| Age of planet | 5 billion years |
| First form of life develops | 3 1/2 billion years |
| Primitive atmosphere | Ammonia, carbon dioxide, methane etc |
| Oparin hypothesis | Explains how organic compounds formed |
| Miller and Urey | Proved Oparin Hypothesis |
| bacteria | first form of life on our planet |
| organic compounds | building blocks of cells |
| eubacteria | modern bacteria |
| types of organic compounds | fat, protein, carbohydarate, nucleic acid |
| Prokaryotic cells | lack nucleus and organelles |
| adaptations | anything which helps an organism survive in its environment |
| ozone | protects the planet from excess radiation |
| eukaryotic cells | more highly evolved and complex than prokaryotic cells; hane a nucleus and organelles |
| nucleus | contains DNA in eukaryotic cells |
| organelles | found in eukaryotic cells |
| Ribosomes | make protein |
| Mitochondria | makes energy |
| golgi bodies | wrap protein |
| endoplasmic reticulum | channels for material to move protein |
| lysosomes | contain enzymes to breakdown dead cells or other material |
| cell membrane | regulates what enters or exits the cell |
| cytoplasm | colloid or gel-like mixture where organelles are found |
| evolution | changes in species over a long period of time |
