Variation and Evolution

Question 1

what are examples of environmental variation

Answer 1

skin colour
scars

Question 2

what is natural selection

Answer 2

1. when organisms have an advantage
2. so are more likely to survive and breed

Question 3

why does variation happen?

Answer 3

because of meiosis and sexual reproduction

Question 4

what is selective breeding

Answer 4

breeding two organisms with desirable traits

Question 5

what are some limitations of selective breeding

Answer 5

1. variation is reduced
2. inbreeding

Question 6

what is genetic engineering

Answer 6

gene for a desirable trait is cut out of one organism and moved to another

Question 7

what is the process for genetic engineering

Answer 7

1. enzymes cut out desired gene
2. gene is put into a vector using enzymes
3. vector is used to put gene into required cells