Kategorier: Alle - natural selection - species - fossils - adaptation

av Deenah mohamed 17 år siden

1482

Charles Darwin 1809-1882

Charles Darwin, born in 1809, profoundly impacted the scientific understanding of evolution. He embarked on a pivotal voyage aboard the HMS Beagle between 1831 and 1836, during which he gathered critical observations and specimens that shaped his theories.

Charles Darwin 1809-1882

Charles Darwin 1809-1882

Evidence

molecular evidence
how evolution has occurred

Compare the DNA base sequence

anatomical evidence
checking for common ancestry

Ex. : homologous structures

fossil evidence

Evolution

Mechanisms of Change
Artificial Selection

allowing only the plants and animals with desirable characteristics to reproduce

Natural Selection
Genetic Drift

a change in the gene pool of a small population that takes place strictly by chance

Genetic Variation/Gene Flow/ Migration

any movement of genes from one population to another

Mutation

a change in the DNA sequence

Work/ Achievments

found fossils of extinct animals that were similar to modern species
1881 The Formation of Vegetable Mould
1871 The Descent of Man
the Origin of Species (1859)
IV. all species have one common ancestor

many species result of DIVERGENCE made possible by ISOLATION

III. the primary mechanism for evolution was a process called natural selection

Ex. Darwin's Finches

III. Variation, naturally occuring

II. Competition between & within species

I. CHANGES in the environment

survival or extinction is determined by that organism's ability to adapt to its environment

II. evolutionary change was gradual, requiring thousands to millions of years
I. Evolution did occur
1854 Barnacles
1842 The Structure and Distribution of Coral Reefs

Life

1882 Death on April 19th
1859 Publication of The Origin of Species
1842 First unpublished ideas on Evolution
1839 marriage to Emma Wedgwood
stomach and heart problems due to overwork
1837 was elected to the Council of the Geographical Society
1831–1836 Voyage of the Beagle
expedition to chart the coastline of South America
1827 enrolled in a Bachelor of Arts course at Christ's College, Cambridge
joined the Plinial Society
a group of students interested in natural history
enrolled at the University of Edinburgh to study medicince
revolted by the brutality of sugery and neglected his studies
british naturalist
born Feb. 1809 died April 1882