Darwin and evolution

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bits of pieces

5 propositions

5th propostion

All species are characterised by variation between individuals. In any new environment there will be different conditions from place to place.

this principle of divergence is the most important factor in the evolution of the new species

4th propostion

If a change occurs in the physical environment, individuals will be exposed to new circumstances, and competition from a different set of inhabitants

3rd propostion

the selective action of the struggle for existence between species and within species

2nd propostion

Imagine the changes which might be effected if there were a similar force acting in nature over millions of years.

1st propostion

Artificial selection has had a marked effect on the form of domesticated plants and animals, although it has only been applied for a small number of generations

misconceptions

5th misconception

Evolution and religion are incompatible.

4th misconception

evolution is not observable or testable

3rd misconception

because fossil record is not his means evolution theory is false.

2nd misconception

Evolutionary theory is a theory about the origin of life.

1st misconception

Evolution is a “ladder of progress”, organisms are constantly getting better.

evolution

-change in the herediatry characterisitics of a group of organisms over the course of generations

Subtopic

species

a group of organisms that can breed with each other to produce fertile offspring & cannot breed with the members of other groups

variation

Genetically determined differences in the characteristics of members of the same species

speciation

Evolutionary process by which new biological species arise

divergence

dividing one specie into two or more species

leader of progress

it is like climbing a ladder...organisms are getting better

natural selection

greater reproductive success among particular members of a species arising from genetically determined characteristics that confer an advantage in a particular environment

fossil

any evidence on ancient life

mutation

a permenant change in the genetic material usually in a single gene

darwin

1882

his death

1859

Publication of The Origin of Species

1842

First unpublished ideas on Evolution

1828

Enters Christ College, Cambridge

1809

his birth