BIODIVERSITY AND NATURAL SELECTION

Question 1

stages of natural selection (6)

Answer 1

• Mutation - difference in DNA
• Variation - different physical appearance/behaviour
• Competitive advantage - Some more suited to the environment & outcompete others
• Survival - those better adapted to the environment survive better
• Reproduction - those most suited to the environment have more offspring
• Pass advantageous alleles on - Offspring inherit alleles so also suited to environment

Question 2

mnemonic for natural selection

Answer 2

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Mutation, Variation, Competition, Survival, Reproduce, Pass-on

Question 3

how does a changing habitat affect natural selection (2)

Answer 3

• the advantages alleles will change

- different traits will be selected for