BIO 108 2026 Exam 120 Questions – Natural Selection Ecology Evolution Biodiversity Answers, Biology

This document contains a comprehensive set of approximately 120 exam questions and verified answers for BIO 108, covering key topics in introductory biology such as evolution, natural selection, ecology, biodiversity, and population dynamics. The material is presented in a clear question-and-answer format, making it highly effective for exam revision, concept reinforcement, and self-testing. The content provides in-depth coverage of foundational biological concepts, including Darwin’s theory of evolution, mechanisms of natural selection, speciation (allopatric and sympatric), and evolutionary patterns such as gradualism and punctuated equilibrium (pages 2–4). It also explores ecological principles such as ecosystems, trophic levels, energy flow, and biogeochemical cycles, along with detailed explanations of population ecology concepts like carrying capacity, growth models, and species interactions (pages 6–11). Additionally, the document addresses biodiversity, conservation biology, and human impacts on ecosystems, including eutrophication, climate change, and sustainability practices (pages 12–13). This resource is ideal for undergraduate students enrolled in introductory biology courses such as BIO 108, General Biology, Environmental Biology, Ecology, and Evolutionary Biology. It is especially useful for first-year university students preparing for midterms or final exams, as well as for revision sessions and practice assessments. High school students taking advanced biology or AP Biology courses may also benefit from this material. The document aligns closely with widely used biology textbooks such as Campbell Biology by Lisa A. Urry et al., which covers evolution, ecology, and biodiversity in depth. It can be used alongside lecture notes, textbooks, and study guides to strengthen understanding and improve exam performance. Keywords: biology exam, natural selection, evolution, ecology, biodiversity, speciation, Darwin theory, population ecology, trophic levels, energy flow, carrying capacity, ecosystems, biogeochemical cycles, eutrophication, conservation biology, sustainability, climate change, genetic variation