Biology Essentials: Cells, Evolution, Pasteurization

Evolution

• Evolution affects populations over time, not individuals.

Cell Theory

1. All living things have cells.
2. Cells are life's basic unit.
3. Cells come from existing cells.

Scientific Theory

• A scientific theory is a strong, well-supported explanation, updated by new evidence, and not easily disproven.

Pasteur

• Louis Pasteur proved cells come from existing cells, disproving spontaneous generation.
• Pasteurization involves heating food to kill bacteria.

Scientific Method

• Hypotheses are accepted or rejected based on data; nothing is definitively 'proven' in science.
• Scientific research requires reproducibility and rigorous verification.

Key Takeaways

• 'Theory' in biology means a strong explanation.
• Evolution: populations, not individuals.
• Cells: from existing cells.
• Science: updates with new data.