Speciation

Question 1

What parts of animals do not decay

Answer 1

Bones

Question 2

What else shows creatures have existed ( 3 )

Answer 2

1/ traces, ie footprints
2/ burrows
3/ Absence of right conditions

Question 3

Why cant the earliest creatures remnants be found

Answer 3

Lots of the living things were soft bodied

Question 4

Why have many of the fossils be destroyed

Answer 4

geological activity

Question 5

What can fossils show ( 3 )

Answer 5

1/ How new species are formed
2/ how new organisms arise
3/ How some species may became extinct

Question 6

Why is there uncertainty of how organisms came to be

Answer 6

There is a lack of enough valid and reliable evidence

Question 7

What are the reasons extinction occurs ( 6 )

Answer 7

1/ New disease
2/ Environment change
3// New competitor
4/ Catastrophe
5/ New predator 
6/ Cyclical nature of speciation

Question 8

what is the first step of speciation

Answer 8

species separated by barrier

Question 9

What causes advantageous characteristics to be carried on

Answer 9

alleles

Question 10

What is the definition of speciation

Answer 10

The species have become too different to interbreed