Evoultionan Variatio

Question 1

What is variation ?

Answer 1

Differences in the characteristics of individuals in a population

Question 2

What are the two types of variation ?

Answer 2

Genetic variation

Environmental variation

Question 3

What causes genetic variation ?

Answer 3

Different genes

From combing the mother and father gametes

Question 4

Give an example of genetic variation ?

Answer 4

Eyecolour

Shape of nose

Question 5

Give an example of environmental variation

Answer 5

Skin colour

Losing toes

Question 6

What are mutations?

Answer 6

Changes to the sequence of bases in DNA

Question 7

Explain what is meant by environmental variation

Answer 7

Differences between members of the same species that have been caused by the conditions something lives in

Question 8

What have all today’s species evolved from ?

Answer 8

Simple life forms that first started to develop over 3 billion years ago

Question 9

Give three factors that can lead to a species becoming extinct ?

Answer 9

• changes in the environment
• catastrophic event
• diseases
• new predators
• changes in the environment