Categorias: Todos - selection - genes - species - adaptation

por maha shamaa 17 anos atrás

307

Darwinian Evolution final

The concept of Darwinian evolution revolves around the idea that all life on Earth shares a common ancestor, leading to the diverse range of species we see today. This process, known as descent with modification, is driven by genetic inheritance.

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