Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
34 Cards in this Set
- Front
- Back
Fossils |
remains of once living species often found in strata |
|
Strata |
layers of rock formed from sedimentary material |
|
Paleontology |
study of fossils |
|
Darwin's conclusions |
1) organisms are related through common descent |
|
Biogeography |
study of distribution of life-forms on earth |
|
Speciation |
formation of a new species |
|
adaptation |
any characteristic that makes an organism more suited to its environment |
|
natural selection |
process of evolution of organisms well adapted to their environment |
|
natural selection steps |
1. members of the population have heritable variations |
|
Fitness |
reproductive success of an individual relative to other members of the population |
|
vestigial structures |
anatomical features that are fully developed in one group of organisms but reduced and nonfunctional in other similar groups |
|
homologous structures |
similar structures explainable by inheritance from a common ancestor |
|
analogous structures |
serve the same function but are not constructed similarly and therefore cannot have the same ancestor |
|
Lamarck |
Developed idea that acquired characteristics can be inherited |
|
Favored during natural selection, but not artificial selection |
1) fast seed germination |
|
Natural selection is the only process that results in: |
1) genetic variation |
|
Why was it helpful to Darwin to learn that Lyell concluded the Earth is very old? |
1) An old earth has more fossils than a new earth |
|
All the finches on the Galapagos Islands: |
a) are unrelated but descended from a common ancestor |
|
biogeographical |
The south American continent lacks rabbits, even though the environment is quite suitable |
|
anatomical |
the human knee bone is the same for all organisms |
|
biochemical |
the genetic code is the same for all organisms |
|
Fossils that serve as transitional links allow scientists to |
a) determine how prehistoric animals interacted with each other |
|
Among vertebrates, the flipper of a dolphin and the fin of a tuna are: |
a) homologous |
|
Which of the pair is mismatched? |
a) darwin - natural selection |
|
According to the inheritance of acquired characteristics hypothesis: |
a) if a man loses his hands, then his children will also be missing his hands |
|
Organisms |
a) compete with other members of their species |
|
DNA nucleotide differences between organisms: |
a) indicate how closely related organisms are |
|
The fossil record offers direct evidence for common descent because you can: |
a) see that the types of fossils change over time |
|
Molecular evidence is increasingly used today to establish relationships because: |
a) genes are composed of DNA |
|
For there to be homologous structures: |
a) a common ancestor had to have existed |
|
Who founded paleontology? |
Georges Cuvier |
|
What things do organisms have? |
Variations |
|
Who conceived the idea "the survival of the fittest"? |
Russel Wallace |
|
What is the only marsupial in the Americas? |
opossum |