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Charles Darwin theory - Coggle Diagram
Charles Darwin theory
key features of natural selection
"survival of the fittest"
there are 4 components
Inheritance
some features are passed down from parent to child. These features are heritable —-> others are impacted by environmental factors + have low heritability.
Selection
The population is growing. Every year, most populations produce more offspring.
population outgrows local resources - leads to death in population
Variation
Organisms within a population show individual variation in appearance and behavior.
variations include ----body size, hair colour, facial markings, voice properties, or number of offspring.
Time
Differential reproduction and survival. Individuals with characteristics that are well-suited to the environment and best suited for the local resources will thrive and contribute to the next generation
why natural selection is important for populations
Natural selections keep the species strong
the strongest genetics get passed to offspring
Natural selection allows for advantages in the offspring
strengths the population of organisms thus helps the population thrive
natural selection example
Giraffe
Inheritance
the difference are passed from parents to offspring
Selection
individual with long neck better suited the tall trees in its environment
the short neck individuals decrease as they aren't fit for the tall trees
Variation
features vary in giraffe - long neck and short neck
Time
successful individuals breed and produce offspring with long neck
over time the majority of population have long necks
What is evolution by natural selection
all organisms came from a common ancestor -
genetic variation in organisms
evolution when small changes occur to a population or organisms, over the course of millions and millions of years.
finches example
different environments lead to different outcomes of the organism
variations in organisms
VASP
adaptation
the organism over time slowly adapts its habits/appearances to fit in the environment it lives in
selection
selection is when organisms adapt and change
variation
same organism different looks behaviour and diets
population
the amount of organisms in the species
