Evolution Evidnace And Theory Flashcards
What is evolution
The scientific theory in which the more complex forms of life have gradually developed from simpler forms
Change in organism over a period of time
How are fossils evidence for evolution
Species that occurred in the past do not occur today. And most species living today are not found in fossil records
Fosels show evolution from single celled to multicellular
What is gradualism
A gradual ongoing process of change and adaptation by the accumulation of traits favored by natural selection
What is the theory of evolution based on
1) Evolutionary change is possible
2) Natural selection determines the course of evolutionary change
What is biographery
the geographical distribution of plants and animals.
There are six distinct regions corresponding to two different parts of the world- North america, Europe and asia, South america, Africa, Antarctica, Australia, and india
How is biogeography evidence for evolution
Biogeography demonstrates convergent evolution
For example, plants living in different deserts are similarly adapted to desert life. However, they are clearly not related.
Those new species are similar to extinct species that lived in the same area because they had to adapt the same
How is resemblance between living species evidence of evolution
All organisms evolved from a common ancestor with a basic bone arrangement. Bones are now a little different but still share resemblance
As animals evolve, some structures are no longer needed, so they’re lost but you can still see remains. This is called vestigial structure
How is embryology vertebrae evidence of evolution
Organisms with its similarities in the development of Embryo suggests that organisms have a common ancestor
What is artificial selection
Artificial selection is similar to natural selection. However, it does not occur naturally. Men will breed a domesticated animal to get a certain outcome. Given enough time, this will produce a new species
How is domesticated animals and plants evidence of evolution
This selective breeding results in a new species over time
How are biochemistry evidence of evolution
Organisms all produce nucleic acid (RNA/DNA) and use ATP, which made genetic engineering possible. Digested, enzymes, and hormone secretion are so similar that humans star diabetic can use hog and cattle insulin. This shows evidence of a shared ancestor
Humans and gorillas only have one protein difference in hemoglobin, then compared to a frog, which has a sixty seven difference. This Means humans and gorillas have a more recent shared ancestor
List all six pieces of evidence that’s prove evolution
Fossils
Biogeo graphy
Resemblance between species
Embryology
Artificial selection
Biochemistry
Explain lamark’s theory of evolution
Lamark believed that acquired characteristics could be passed down. This was based on the muscles that were used, became larger and stronger, and disused were shriveled and weakened.
What are acquired characteristics
Physical changes in your lifetime. They do not contribute to genetic change/evolution.
How did lamak explain giraffes long ne
He believed that giraffes had long necks due to the extended use of stretching out the neck.
