Evidence of Evolution

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by ryaneruszala
Last updated 5 years ago

Discipline:
Science
Subject:
Evolutionary Biology

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Evidence of Evolution

Evidence of EvolutionBy: Ryane Ruszala

Fossil Records

This fossil record of a whale and it's ancestors shows the evolution of the species. An ancestor of the whale had legs (to walk on land), and the modern day species has a vestigial pelvic bone.

Evidence of Evolution Crash Course

Chemical and Anatomical Similarities

Homologous structures are structures that are similar to others in a separate species. They show that animals with these similar structures come from a common ancestor. Analogous structures are shown in different species and show very different organisms that have evolved to have similar characteristics.Vestigial structures are parts in the body that are no longer needed or used. Ex. pelvic bones in whales. These show that the organism needed this structure in the past.

How Does Embryology Work?

Which one is the human embryo?The left one

Similar gene structures in different species show evidence of evolution. Scientists have proven that some organisms (whether similar or different) relate back to a common ancestor.

Embryonic development also helps provide evidence of evolution. The young embryos of many species look very much the same. It isn't until later in the pregnancy that you can differentiate from different organisms.

Gene Structures

Structures

Embryonic Development

Humans differ only 1.2% from apes in their genome.

Geographic Distribution of Related Species

When the world was first formed, the contents were all part of one super-continent scientists call Pangea. Similar species lived together until Pangea broke up by plates in the Earth moving (Plate Techtonics). The species that once lived together were broken up and separated to live on the seven continents we have today.

Natural and Artificial Selection

Natural Selection is the process by which organisms adapt to their natural environment and reproduce. This was originally proposed by Charles Darwin. Artificial Selection happens when people breed plants or animals specifically to produce desirable traits. These two processes contribute to evolution. Natural selection helps with the variation of a species and through use and disuse the species can evolve. Artificial selection hinders the variation of a species and since specific traits are desired, traits that allow a species to survive in the wild may be lost.

How Species Split

How Artificial Selection Works


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