🧪 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
Where natural selection is a mechanism for evolution, the opposite is also true; artificial selection helps advance evolution as well. Artificial selection is exactly what it sounds like. It is a type of selective breeding in order to manipulate the phenotypic frequencies of a population or species.
This is used by humans in both animal and plant breeding in order to keep desirable traits and get rid of potentially harmful characteristics. Humans use this for breeding dogs (some species were created artificially), and also for food sources such as corn and wheat. Effectively, artificial selection is how humans can manipulate the phenotypic variety of a population.
Environmental pressure can also play a part in this. While convergent evolution is not “artificial”, it is caused by a manipulation coming from the environmental pressures.
An example of convergent evolution would include wings. Many different animals have wings, like birds, insects and bats. However, these do not all share a common ancestor, meaning each of their wing-like structures evolved independently, but into similar structures and functions.
Image Courtesy of Major Differences
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