Bio 400 Exam Questions With All Correct Answers 2025 Marking Scheme

Bio 400 Exam Questions With All Correct Answers 2025 Marking Scheme morphological species concept - Answer- physical trais, phenotypic characteristics ecological species concept - Answer- based more on interaction with environment Genetic Species Concept - Answer- How genetically similar-used in asexual Limits of Bio species concept - Answer- won't work for asexual or populations that are geographically isolated bc they will never naturally come in contact Ecological Isolation - Answer- species occur in same area but occupy differnt habitats and rarely encounter one another. ex: Lion and tiger Biological Species Concept - Answer- If two individuals can reproduce and make viable offspring they are the same species. If not, not the same Temporal Isolation - Answer- Species reproduce in different seasons or at different times of the day Behavioral isolation - Answer- species differ in mating rituals Mechanical isolation - Answer- Structural differences between species prevent mating Gametic Isolation - Answer- Prevents gamete fusion. Gametes of one species functions poorly with gametes of another species Two reproductive barriers - Answer- Prezygotic and Postzygotic postzygotic reproductive barriers - Answer- 1) Reduced Hybrid Viability 2) Reduced Hybrid Fertility 3) Hybrid Breakdown prezygotic reproductive barriers - Answer- 1) Habitat Isolation 2) Behavioral Isolation 3) Temporal Isolation 4) Mechanical Isolation 5) Gametic Isolation How to new species arise - Answer- Pop become genetically isolated-Genetically diverge-Reproductive isolating mechanism evolves allopatric Speciation - Answer- Formation of new species while isolated from parent population Sympatric Speciation - Answer- The formation of new species in populations that live in the same geographic area Hybrid Zone - Answer- members of different species meet and mate, producing at least some offspring of mixed ancestry