Chapter 22 Descent with Modification-Darwin Flashcards
Evolution-Darwin Phrase and Book
“Descent with Modification”/ Origin of Species
Darwin Revolution challenged traditional views of Earth (2)
Carolus Linnaeous naming system and Jean Baptise de Lamarck’s use and disuse
What does descent with modification by natural selection explain?
the adaptations of organisms and unity/diversity of life
Key Observations of Darwin’s Voyage (2)
Plants/animals in temperate regions of S. America more resembled species of S. American tropics than other species in Europe/Unique species of Galapagos Islands
Adaptations
Characteristics inherited-helps with survival and reproduction
Natural Selection proved
person with inherited traits more likely to survive/reproduce due to traits
Descent with Modification
Earths species are descendants of ancestral species
History of life is like a tree (evolutionary tree)
diagram that reflects evolutionary relationships among groups of organisms
Artificial Selection
selective breeding of plants/ animals-desirable traits
Darwin’s Interference #1 and #2
Individuals with inherited traits more likely to survive/reproduce-leave more offspring/unequal ability of survival/reproduction will lead to accumulation of favorable traits in population
Main Ideas of Nat. Selection (2)
Individuals in population vary in heritable characteristics/Organisms produce more offspring than environment can support
Homology
similarity resulting from common ancestory
Direct Observation of evolution (2)
1) Herbivores eating primary food source 2)Disease/pathogens evolve too
Homologous Structures
Similar structures diff. species-common ancestory
Vestigial Structures
remnants of features served a function in organism’s ancestors
