Unit Three- Darwins Theory

Question 1

when did darwin develop his theory

Answer 1

when he visited the Galápagos Islands on HMS Beagle

Question 2

what did Darwin discover

Answer 2

theory of evolution- how modern organisms evolved over a long period of time through decent on common ancestors

Question 3

what are darwin’s three patterns he noticed

Answer 3

1. species vary globally
2. species vary locally
3. species vary over time

Question 4

explain species vary globally

Answer 4

-different yet ecologically similar animals inhabit different but ecologically similar habitats

-don’t have close ancestors develop similar characteristics because of similar habitat

Question 5

explain species vary locally

Answer 5

related species often occupied different habitats within a local area

Question 6

explain species vary overtime

Answer 6

darwin realized that fossils of extinct animals were similar to living species

Question 7

darwin’s 5 main points

Answer 7

1. members of a population have heritable traits
2. in a population, more individuals are born than can survive
3. some animals have adaptable characteristics that enable them to survive and reproduce better
4. once a favourable trait is developed, it’s more likely to be passed on
5. the result on natural selection is a population adapted to its environment