🧪 Unit 1: Chemistry of Life
1.3Introduction to Biological Macromolecules
1.4Properties of Biological Macromolecules
1.5Structure and Function of Biological Macromolecules
🧬 Unit 2: Cell Structure and Function
2.1Cell Structure: Subcellular Components
🔋 Unit 3: Cellular Energetics
🦠 Unit 4: Cell Communication and Cell Cycle
4.0Unit 4 Overview: Cell Communication and Cell Cycle
4.2Introduction to Signal Transduction
👪 Unit 5: Heredity
👻 Unit 6: Gene Expression and Regulation
🦍 Unit 7: Natural Selection
🌲 Unit 8: Ecology
8.4Effect of Density of Populations
👏 General Review
✍️ Free Response Questions (FRQ)
Biology Short Essay Free Response Questions
🧐 Multiple Choice Questions (MCQ)
Biology Multiple Choice Questions
⏱️ 1 min read
May 31, 2020
Another good reasoning for the theory of evolution is that there is evidence in every species, not just a select few. There has been proven genomic changes over time, which helps assume the influence of a shared common ancestor. As fossils are found and dated, scientists have also noticed continuous change in their characteristics and the fossil record in general.
Most notably, however, is the constant adaptation of bacteria in their ability to resist antibiotics. This works as its own form of malicious natural selection. When a new antibiotic is developed and dispersed, the bacteria that are unaffected (usually due to a random mutation) will reproduce and pass along that mutation (as the genetic code is identical), and soon the antibiotic will be rendered useless in killing off the harmful bacteria.
Image courtesy of Giphy.
Evolution is constant in this never-ending cycle, along with that of pesticides, herbicides, and even chemotherapy drugs. Even worse, pathogens will continue to evolve and cause emergent diseases that were once eradicated.
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