Who wrote his theory of natural selection 150 years ago?

What did this theory explain?

What does this theory say?

He did not know exactly how adaptations were passed on. We now know that when organisms reproduce, their genes are passed on to the next generation. How can the modern version of natural selection be summarised?

Over time, the changes produced by natural selection may result in a new species. Only when can this happen?

Why might organisms be prevented from mating?

What is this?

How else may organisms also be prevented from mating?

If each group evolves differently over time what could happen?

Why is natural selection difficult to study?

Some examples have been studied over shorter time spans. Give two examples of this.

Why at first did many people disagree with Darwin's ideas?

Why now is Darwin's theory much more widely accepted?

There have been other attempts to explain evolution. Before Darwin, Jean Baptiste de Lamarck had a different theory. What was this called?

What did this theory say?

What have we discovered more about so that theories like Lamarck's have been proved incorrect and Darwin's theory has become more widely accepted?