2. name and define the four main principles that make up the theory of natural selection. (8pts)

2. name and define the four main principles that make up the theory of natural selection. (8pts)

2. name and define the four main principles that make up the theory of natural selection. (8pts)

Answer

Brief Explanations:

Charles Darwin's theory of natural selection is based on four fundamental principles that explain how populations evolve over time. These principles describe the relationship between heritable traits, environmental pressures, and reproductive success.

  1. Variation: Individuals within a population possess different physical or behavioral traits. These differences are often the result of genetic mutations or recombination.
  2. Inheritance: Many of these variations are heritable, meaning they can be passed down from parents to offspring through genetic material.
  3. Overproduction: Populations typically produce more offspring than the environment's resources (food, water, space) can support. This leads to a "struggle for existence" or competition among individuals.
  4. Differential Survival and Reproduction (Selection): Individuals with traits better suited to their environment are more likely to survive and reproduce. Over generations, these advantageous traits become more common in the population, a process known as adaptation.

Answer:

  1. Variation: Differences in traits among individuals in a population.
  2. Inheritance: The passing of traits from parents to offspring via genes.
  3. Overproduction: Producing more offspring than can survive due to limited resources.
  4. Differential Survival and Reproduction: Individuals with favorable adaptations survive and reproduce at higher rates, leading to evolutionary change.