Theory of Evolution

Kaitlyn Draper

Anatomical Evidence

Anatomical means relating to the structure of the bodies of people and animals.

1 Homologous

2 Analogous

3 Vestigial

4 Embryos

Homologous Structures

Homologous structures are body parts that are similar in structure, but have different functions.

Examples- Humans, cats, whales, bats, horses, and birds

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Analogous Structures

Body parts that are different in stricter, but have the same function.

Examples- Birds, bats and butterflies all have wings, but have evolved into different species with different structures.

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Vestigial Structures

Body parts that have reduced function, or are entirely useless.

Examples- Appendix, wisdom teeth, tail bone, pelvic bone in whales, and wings in flightless birds.

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Embryos

An embryo is any unborn human in its earliest phases. Embryos of many different kinds of animals are often very similar and are usually hard to tell apart. This may show how organisms came from a common ancestor.
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Biochemical Evidence

Biochemical evidence is the branch of science that deals with chemical processes that happen with in living organisms.

1 DNA

2 Protiens

3 Amino Acids

DNA

A mutation is a change in DNA, the hereditary material of life. An organism's DNA affects how it looks, how it behaves, and its physiology. So a change in an organism's DNA can cause changes in how an organism adapts over a period of time.
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Gel Electrophoriesis

The proteins of human and chimpanzee are about 99% identical.

There are at least 26 species of the protozoan Tetrahymena, all of which are nearly identical in structure, BUT there are enormous differences between their homologous proteins. The same is true of the more than 2000 species of fruit flies.

Comparing selected proteins, evolutionists hope to show not only phylogenetic relationships but also a "molecular clock" that will provide a relative time table for evolution.

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Amino Acids

All humans have the same twenty amino acids. This supporting that we all came from one organism.

Paleontological Evidence

The scientific study of prehistoric life.

1 Fossils

2 Radio Metric Dating

3 Transitional Fossil

Fossils

In the 19th century Mary Ann Mantell picked up a tooth, which her husband Gideon thought to be of a large iguana, but it turned out to be the tooth of a dinosaur, Iguanodon. This discovery sent the powerful message that many fossils represented forms of life that are no longer with us today.
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Radio Metric Dating

Geologists use radiometric dating to estimate how long ago rocks formed, and to infer the ages of fossils contained within those rocks. This shows them how long fossils have been there and shows them different fossils from the past.

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Transitional Fossil

A transitional fossil is any fossil which gives us information about a transition from one species to another.

Example- Neanderthal skull to human skull

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