4.3.6 Evidence of Evolution

Question 1

What is the difference between evolution and natural selection

Answer 1

Evolution - How species have changed over time
Natural Selection - The process by which evolution occur

Question 2

Darwin’s observations

Answer 2

• Not all organisms survive
• Populations fluctuate
• Populations of the same species show intraspecific variation
• Offspring inherit characteristics from their parents

Question 3

Evidence for evolution?

Answer 3

• Fossils
• Molecular evidence (genes passes characteristics to offspring)

Question 4

How do fossils provide evidence of evolution

Answer 4

• Fossils can be dated
• Sequence from oldest to youngest can be formed
• We can see how organisms have changed in similarity over time
• And see how present day species and ancestral species are related
• Shows proof of gradual change from simple life forms
• We can see evolutionary relationships between organisms

Question 5

How can molecular evidence provide evidence for the theory of evolution?

Answer 5

• DNA can be sequenced
• Compared with other organisms
• To see how genetic code in species has changed over time