7.1 Theories of evolution

Question 1

How long ago did life begin on earth?

Answer 1

3 billion years

Question 2

What di Jean-Baptiste Lamark suggest about evolution?

Answer 2

A theory called The Inheritance of acquired characteristics.

Question 3

What does the Inheritance of acquired characteristics theory suggest?

Answer 3

Characteristics which develop during an organisms life time can be passed on to the next generation, eg if you build bu muscles this can be passed onto your offspring

Question 4

Where did Charles Darwin journey to when he came up with the theory of natural selection

Answer 4

Galapagos Islands

Question 5

What did Darwin’s theory state 3

Answer 5

That all organisms in a species vary, and therefore some are more likely to survive. Those that are best adapted bread and pass on their characteristics. Change happens in very small steps over a long period of time

Question 6

Darwin did not know about genes.How do we talk about natural selection in terms of genes?

Answer 6

The best adapted organisms survive to breed and pass on their genes to the next generation

Question 7

Why did people find it hard to accept Darwins theory of natural selection 2

Answer 7

The theory challenged the idea that God made all life on earth

Many scientists did not accept the theory as Darwin could not explain why ther was variety in organism or how inheritance worked - it was 50 year later when genes were discovered.

Question 8

Which birds did Darwin observe to find evidence for evolution?

Answer 8

Finches