Who's the theorist?
How did Charles Darwin come up with the idea of evolution?
By observing variations in finches on the Galapagos Islands during his voyage
What is behavioral Isolation?
Species don't interbreed due to signals, rituals, or songs
When traits that increase survival in an environment are favoured
Natural selection
This scientist came up with natura selection at the same time as Darwin but is well known 👁👁
Alfred Russel Wallace 🙌🙌
A protein used to compare species and show evolutionary relationships
Cytochrome C
What is artificial selection
Selection caused by humans, ex; dog breeding
Thomas Malthus 👀👀👀
He influenced Darwin by explaining that populations grow faster than resources which leads to competition and Malthusian Catastrophe.
What is a way to reduce speciation and how does it work?
Gene flow is a way to reduce speciation
-- Introducing new alleles and mixing the gene pool in order to stop a species from becoming a distinct species.
Ex; Polar bears and brown bears
Type of selection that favours average traits and reduces extremes
Stabilizing selection
This theorist believed that organisms inherited traits in their lifetime through adaptation and later on passed these new traits to their offspring.
Who is he and why is he wrong?
Jean-Baptiste Lamarck 😅😅😅❌❌❌❌❌❌❌❌❌❌❌❌❌❌❌
What are transitional fossils?
Transitional fossils were animals that showed both ancestral and modern traits. A combination of old and new traits.
A population of birds has mostly medium sized beaks. After a drought, only birds with very small or very large beaks survive. Overtime, the population splits into 2 groups.
What kind of selection is this?
Disruptive selection