7.1 Introduction to Natural Selection

• What is the definition of natural selection?

  Advantageous traits become more common
• Genetic drift is driven by adaptation.

  False
• What is the first key component of natural selection?

  Variation
• Differential survival and reproduction are key components of natural selection.

  True
• Artificial selection is driven by the environment.

  False
• Why is genetic variation important for natural selection?

  Provides raw material
• Genetic variation arises through processes like mutation and genetic recombination.
• Genetic variation refers to differences in genetic makeup between individuals in a population.
• Genetic variation provides the raw material for natural selection to drive evolutionary change.

  True
• Genetic drift refers to random changes in allele frequencies not driven by adaptation.
• Why is genetic variation essential for populations to adapt to changing environmental conditions?

  Provides raw material
• Match the ecosystem with its environmental driver and beneficial trait:

  Aquatic ↔️ Limited sunlight ||| Camouflage

  Terrestrial ↔️ Harsh climate ||| Drought resistance
• Natural selection is a key mechanism of evolution
• Match each evolutionary mechanism with its definition:

  Natural Selection ↔️ Traits confer survival advantage

  Genetic Drift ↔️ Random changes in allele frequencies

  Mutation ↔️ Changes in the genetic code

  Gene Flow ↔️ Movement of genetic material
• The genetic makeup of a population changes over time due to adaptation
• What is the main difference between natural and artificial selection?

  Human involvement
• Genetic variation arises through processes like mutation and genetic recombination
• Natural selection can occur without genetic variation.

  False
• What is the role of genetic variation in natural selection?

  Raw material
• What is the process by which individuals with advantageous traits are more likely to survive and reproduce?

  Natural selection
• What is one of the key mechanisms of evolution described in the study material?

  Natural selection
• Artificial selection is driven by human preferences, whereas natural selection is driven by environmental conditions.


  True
• Environmental pressures such as predators favor better camouflage or defense mechanisms.