darwin

What are the 4 necessary conditions for evolution

Struggle for survival, inheritable variation within a population, variation of fitness, lots of time

Struggle for survival

Competetition between living things to survive. When there are more animals than the environment can handle so they compete for resources

Inheritable variation

Before the environment can choose the best traits, those traits must already exist in the population and those differences must be genetic./ individuals in a species have different traits that are passed down from parents to offspring.

Variation of fitness amongst members of the same population

An organisms ability to survive and reproduce, high fitness means higher chance to survive and reproduce more. When it has offspring it will give them its good genes that result in useful trait

Lots of time

Over many generations. 100 years is the magic number for time for evolution

Population

Multiple members of the same species ( giraffes in grassland is population)

Inheritable trait

A trait that can be passed to offspring caused by variations in genes

Inheritable

Heritable