作者：maha shamaa 18 年以前
397
Darwinian Evolution final
Darwinian Evolution
his theory
has been observable and tested
genetic mutation
artificial selection
study of living species
the fossil record
Evolution;
does not contradict religion
because they are two different unrelated things
is not a random process
definition of evolution
it's a cumulative change that occur in a population overtime
Important concepts
Micro and Macro evolution which are the study of evolution in both small and large scales
genes: portions of an organism's DNA that carry the code responsible for the built of that's oragnism
Species: a group of interbreeding or potentially interbreeding populations
his misunderstoods
that his theory is false due to the incomplete record fossil
fossilization is a very rare eent
that evolution is related to the origin of life
which is wrong because evolution deals with the way of life after it's origin
he claims that evolution is a ladder of progress
this has been misunderstood as conditions are changing and what is better under a condition may not under another
His book of the "Origins of Species"
he discovered the finches which looked different
introduced the concept of mutation and changes in species
discussed natural selection and the survival of the fittest
His propositions
divergence which result from isolation
variation will be favoured which will give tendency for varieties to become more distinct
changes in circumstances will favour transmission of advantageous features in new conditions
that selectve action struggle for existence
that artificial selection had a marked effect
Mechanisms
Adaptation: common feature that prvides improved function
Genetic Variation contains 3 sources:mutations, gene flow, sex
Artifical selection: is the intentional reproduction of individuals that have desirable traits
Natural selection: nature chooses those better able to survive and reproduce
Biological evolution
all life on earth shares a common ancestor and this led to the great diversity in the kind of species
descent with modification through genetic inheritance
