Evolution Flashcards
What is evolution?
Change in a species over time that can lead it to evolve into another species
What were Darwin’s observations?
Offspring looked like their parents
No two individuals are identical
Organisms have the ability to produce large numbers of offspring
Populations in nature tend to remain fairly stable in size
What is variation?
When there are differences in a species
How can fossils prove evolution?
They show how older versions of species that are still alive and how they have adapted into its form now
How can biological molecules prove evolution?
They can be used to see the similarities in organisms to see if they are closely related or not or if they split off at some point
Give an example of a biological molecule that could prove evolution
Cytochrome C
DNA
What happens to the biological sequences if they are tested for evolution?
It can be compared and the number of similarities and difference shows where they may have spilt off and chaged
How can pesticiede resistance in insects prove evolution?
There are some insects that are pesticide resistant
The insects change to be resistant to pesticides so they can live more
The non resistant insects are killed and the new resistant ones reproduce more and pass down the resistance so they are more like to live
How can mitochondria DNA prove evolution?
It can show the pattern, similarities and differences in the organisms and where they originate from
How can microorganisms prove evolution?
Microorganisms adapt to their environment and can adapt. They become resistant to a certain antibiotics, so the non resistant ones die and the resistant ones reproduce to make more, so that they can pass on the alleles and are dominant
How does natural selection work?
There’s variation in the many offspring
They compete for resources
The almost advantageously adapted ones prosper and so they reproduce
Their offspring inherit the good alleles and so they evolve more and may become another species
