Diversity of organisms

• How does variation manifest even among identical twins?

  Through differences in genetic expression
• Why is variation important for evolution?

  It is a condition for natural selection
• How is a species defined from a creationist perspective?

  Each species was created and remains unchanged
• What is a limitation of defining species based solely on morphology?

  Species change over time
• What is the purpose of binomial nomenclature?

  To provide internationally recognized names
• What does the term "binomial" refer to in binomial nomenclature?

  Two names: genus and species
• How should the genus name be written in binomial nomenclature?

  Capitalized
• How should the species name be written in binomial nomenclature?

  Not capitalized
• How should binomial names be formatted when typed?

  In italics
• How should binomial names be formatted when handwritten?

  Underlined
• What does it mean to abbreviate a species name?

  Use the first letter of the genus
• How is a species defined in terms of reproduction?

  Group of individuals that can interbreed
• Why is the term "fertile" important in defining a species?

  Offspring must be able to reproduce
• What is a "zorse"?

  A hybrid of zebra and horse
• Why are zebras and horses considered different species?

  Their hybrid offspring (zorse) is sterile
• What is a population?

  A group of the same species in an area
• What happens when two populations of the same species do not interbreed?

  They may still be the same species
• What can cause two populations to stop interbreeding?

  Separation by environmental factors
• What is a challenge in defining when species diverge?

  Determining when they can no longer interbreed
• What is a limitation of the current species definition?

  It may not account for gradual changes