Evolution

What do scientists think of evolution as a theory?
Watch the video that I will show you in class and answer the following questions:
 * Does theory becomes a fact? Theory explains a fact
 * Why is Evolution an important theory in Biology?
 * What is the key element of hypothesis or theory?
 * So what does a theory do?

But Evolution is JUST a theory

 * What is a theory in a scientific sense?
 * Do you need to see to “believe” in a theory?
 * What can scientists rely on theory for?
 * What are inferences based on?

Theory explains facts -> a framework to ask question to explain phenomenon -> leads to predictions -> explains laws and facts -> Evolution explains biodiversity -> theories put together observations, laws and hypothesis -> may not be something that can proven with what we see but helps to explain what we observe eg. gravitational theory (we don't see gravity) -Darwin came up with theory through laws, observations and evidence at hand

What is evolution?

 * Evolution is a process that results in heritable changes in a population spread over many generations.
 * Biological evolution is change in the properties of populations of organisms that transcend the lifetime of a single individual.
 * Biological evolution refers to populations and not to individuals
 * Changes must be passed on to the next generation- heritable
 * Therefore it can also be defined as:  any change in the frequency of alleles within a gene pool from one generation to the next

allele-genes that stands for same type of trait e.g. alleles for straight and wavy hair

Macroconcept: Change occurs with time

Where did the idea come from-> influence from many people Voyage on Beagle Alfred Russel Wallace was a naturalist wokring mostly in the Malay Archipelago-> read essay on the principle of population by Malthus -> "flashed upon me the idea of sruvival of the fittest"->Wallace had studied the distribution of animal species and concluded that both a selection and an evolution had to have taken place.