Bio 191 Test One Exams Questions & Answers 100% Correct!

Darwin's Observation #1 - ANSWERMembers of a population often vary in their inherited traits. For example, Asian ladybird beetles vary in color and spot pattern. Darwin's Observation #2 - ANSWERAll species can produce more offspring than the environment can support, and many of these offspring fail to survive and reproduce. For example, the puffball fungus can produce many spores that give rise to many offspring. If all of the spores and their offspring survived, they would cover the surrounding land surface. Darwin's Inference #1 - ANSWERIndividuals whose inherited traits give them a higher probability of surviving and reproducing in a given environment tend to leave more offspring than other individuals. For example, giraffes with longer necks were able to reach the taller trees which kept them alive longer and reproduce more. Darwin's Inference #2 - ANSWERthis unequal ability of individuals to survive and reproduce will lead to the accumulation of favorable traits in the population over generations. For example, the rise of predators can lead to the increase of favorable traits in a population. Evolution - ANSWERall organisms are related through descent from an ancestor that lived in the past (descent with modification) Adaptations - ANSWERtraits that improve an individual's ability to survive and reproduce (traits) Artificial selection - ANSWERhumans have modified other species by selecting and breeding individuals with desired traits What will never evolve or adapt? - ANSWERan individual Fossil Record - ANSWERprovides evidence of the extinction of species, the origin of new groups, and changes within groups over time Convergent evolution - ANSWERevolution of similar or analogous features in distantly related groups analogous traits - ANSWERwhen groups independently adapt to similar environments in similar ways