Chapter 4 - Evolution - Darwin And Lamarck

Question 1

What was Lamarck’s theory?

Answer 1

Evolution by acquired characteristics - thought giraffes evolved by stretching their necks overtime

Question 2

Why was Lamarck’s theory wrong?

Answer 2

Environmental variation does not get passed on

Question 3

What was Darwin’s theory? (briefly)

Answer 3

Evolution by natural selection

Question 4

Was Darwin’s theory right?

Answer 4

Darwin took a guess, but it was right

Question 5

What was Darwin’s theory?

Answer 5

Evolution is the slow, continual change of organisms over a very long time. All living things on the Earth have developed from the first simple life forms that arrived 3,000,000,000 years ago

Question 6

If species don’t adapt, why may they become extinct?

Answer 6

1. Increased competition
2. Changes in the environment
3. New diseases
4. New predators

Question 7

What are the effects of evolution?

Answer 7

Species will become better adapted to their environment

Question 8

What allows evolution to happen?

Answer 8

1. Increased competition
2. Changes in the environment
3. New diseases
4. New predators

Question 9

What were Darwin’s observations?

Answer 9

1. All living things produce more offspring than survive to adulthood
2. In spite of this, population sizes remain roughly constant
3. Variation exists among species
4. Characteristics can be passed on from one generation to the next