evolution Flashcards
did we evolve directly from apes?
no but we have a common ancestor
what is evolution
change in populations of a species
what is catastrophism
some organisms from the past are very different from the ones today
what is Uniformitarianism?
past geological still at work
today
what was lamark’s hypothesis?
Inherit acquired characteristics and believed life could evolve from nonliving matter
were lamarks hypothesis’s true?
no
how many years did charles darwin spend studying wild life?
5 years
what was darwins boat name (maybe extra credit)
HMS Beagle
what are the 4 steps of natural selection?
overproduction, genetic variation, struggle to survive, and differential reproduction.
what is overproduction
each species produces more offspring than can survive
what is genetic variation
species in a population have a variety of traits
what is struggle to survive
species with adaptive traits are more likely to survive and reproduce
what is carrying capacity
different ecosystems can only hold a certain amount of species
what is the evidence of evolution
fossils, biogeography, homologous structures, and vestigial structures
what are homologous structures
structures that are the same on the inside
what are vestigial structures
structures in our body that we have no use for
how old is earth
4.6 billion years old
how long ago did dinosaurs go extinct
65 million years ago
explain adaption
inherited characteristics that increase an organisms ability to survive
what is fitness measured in?
grandchildren
explain fitness
unique to a particular environment
what is descent with modification
Each living species has descended, with
changes, from other species over time
what is artificial selection
nature gives variation, humans choose the useful one of the variances
define Archaeopteryx
missing links
define morphology
“soul” of evolutionary evidence
what is a gene pool
combined collection of genes for all traits in a population
what is genetic equilibrium
occurs when the gene frequencies are stable from generation to generation