DARWIN VS LAMARCK

Charles Darwin came up with the theory of evolution by…

Natural selection

Was Lamarcks theory approved or disproved?

Disproved

Why werent Darwins ideas originally accepted?

• Went against the teachings of the church.

• Genes hadnt been discovered yet.

What is natural selection?

The idea that organisms with characteristics/genes better suited to their environment will survive better and reproduce offspring.

Lamarck came up with the theory of evolution by passing on…

Acquired characteristics

Lamarck believed aquired characteristics would keep on being inherited until…

Speciation occurs

Analogy to disprove lamarcks theory

Hes basically saying if a woman dyes her hair blonde, she will have blond children

What discovery approved Darwins theory?

The discovery of genes + genetics

What is Darwins famous book on the theory of evolution by natural selection?

The Origin of Species

“Explain why the birds with longer beaks which feed from bird feeders are more likely to survive than those with short beaks” [6]

• there is a variation in beak length- this variation is due to mutations.

• Beak length is controlled by genes.

• Birds with longer beaks can reach more food.

• + they can fight/outcompete birds with shorter beaks- therefore have more energy from food.

• So they reproduce more.

• Offspring who inherit long beaks can reach allele are more likely to survive.

• Repeats over many generations- longer beaks more likely to survive.