Evolution Flashcards
What did Lamarck say?
The inheritance of acquired characteristics
Characteristics developed over an organisms life can be passed down through genes, so a giraffe has a small head but stretches to reach the leaves and it’s neck grows and this is passed on to offspring. Very very gradually however.
What did Darwin say?
Natural selection
Small mutations cause variations within species that help it survive better, reproduce and pass down the alleles needed to survive
Why was Darwin’s theory only gradually accepted?
Challenged God
Not enough evidence
Didn’t know about genes at the time
How get 6 marks in a natural selection question
Mutation Variation Well adapted Survive Breed Pass on alleles
ALL IN CONTEXT
What is grouping organisms called?
Classification
What are the names of the smallest and the largest animal groups?
Species
Kingdom
Members from the same offspring can do what?
Reproduce fertile offspring
What are evolutionary trees and relationships?
How organisms have mutated and reproduced to form variation within a species and the links between these. it also shows how animals became extinct and what took their place in their kingdom.