Evoultionan Variatio Flashcards Preview

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Flashcards in Evoultionan Variatio Deck (9)
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1
Q

What is variation ?

A

Differences in the characteristics of individuals in a population

2
Q

What are the two types of variation ?

A

Genetic variation

Environmental variation

3
Q

What causes genetic variation ?

A

Different genes

From combing the mother and father gametes

4
Q

Give an example of genetic variation ?

A

Eyecolour

Shape of nose

5
Q

Give an example of environmental variation

A

Skin colour

Losing toes

6
Q

What are mutations?

A

Changes to the sequence of bases in DNA

7
Q

Explain what is meant by environmental variation

A

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

8
Q

What have all today’s species evolved from ?

A

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

9
Q

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

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