Darwin

Question 1

Darwin’s theory 5 stages

Answer 1

Genetic variation; characteristics vary between individuals
Environmental change; condition changes causing more competition
Natural Selection ; by chance genetic advantages make better coping mechanisms
Inheritance ; those with advantage survive passing them to offspring who are better adapted
Evolution; it may repeat

Question 2

Pentadactyl limbs suggest the

Answer 2

Evolution of humans,bats and dolphins to a common ancestor

Question 3

Bacteria domain description

Answer 3

No nucleus no unused sections of genes

Question 4

Archaea domain description

Answer 4

No nucleus, unused sections of genes

Question 5

Eukarya domain description

Answer 5

Nucleus , unused sections of genes

Question 6

Golden rice adv

Answer 6

Inserted with daffodil and bacterium gene to produce beta carotene which helps humans produce vitamin a to stop blindness

Question 7

Know diagram of tissue culture

Answer 7

Yes

Question 8

Risks of selective breeding

Answer 8

Alleles that may be useful in the future are no longer found
Be bad for animals themselves
May be bad for health in long term effects.

Question 9

Genetic engineering steps

Answer 9

Cut section of DNA out using restriction enzymes producing jagged, unpaired ends called sticky ends
Use restriction enzymes on bacterium plasmid which will produce same sticky ends
DNA and plasmid are mixed together and the complementary base pairs join up through an enzyme called ligament which acts as a glue
Insert into bacterium and grown in large VATS

Question 10

Biological control and weaknesses

Answer 10

Using organisms to control pests
May eliminate target population
May eliminate other populations
May affect humans through

Question 11

Fertilise weakness

Answer 11

Cause excess in minerals that are harmful to organisms and humans