Ch 16 long answers Flashcards
(4 cards)
How do you think either of these dog breeds would have been produced from a single ancestor?
Humans have selected different traits that they find desirable + have bred a wolf with that trait with other wolves or close relatives of the wolves to produce traits that are passed on over generations
Lamarak’s 5 theories
1) population of individuals all of the same kind. Individuals capable of transformation.
2) Environment changes, creating a “need” to change
3) Development of new features to survive
4)newly acquired traits somehow get passed onto offspring
5) new species, eventually
Darwin’s 5 theories
1) population of interbreeding individuals with similar characteristics, though variation is common among them at all times.individuals are fixed and unchanging. populations are capable of transformation.
2)variation of inheritable features
3) environment selects features contributing to survival
4) those with traits which help survival tend to survive and have more offspring, who inherit those traits
5) new species, eventually
Transformation
How? over a long period of time adapt