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Biology 121, Exam 3 Study Guide 2025 Questions and Answers Before Charles Darwin what were people's belief on the species found on earth? ....ANSWER☑️☑️...-Earth was only 6000 years old Earth and it's organisms would not change All organisms were created at the same time What is Natural Selection? - ....ANSWER☑️☑️...-The process by which organisms with certain traits are more likely to survive and reproduce than other organisms. What were Darwin's observations and that led to competition, natural selection and evolution? - ....ANSWER☑️☑️...-Observed that populations produced more individuals than can survive. Does evolution have a goal? - ....ANSWER☑️☑️...-No, occurs in response to local environmental conditions, not future ones. Does an Individual evolve? Does a population evolve? - ....ANSWER☑️☑️...-No; Yes What is fitness and it's basic measurement? - ....ANSWER☑️☑️...-Fitness is a measure only in terms of the number of healthy offspring produced. What is Biogeography? - ....ANSWER☑️☑️...-The study of the geographic distribution of species. What is gene pool? - ....ANSWER☑️☑️...-Consists of all versions of all the genes carried by all the individuals in a population. FOR STUDY PURPOSES ONLY ©️ 2025 ALL RIGHTS RESERVED 1