Edexcel GCSE Biology Topic 4 Natural selection and genetic modification overview quiz quiz

The environment

Selective breeding

Random mutations in DNA

The choices an animal makes

Mendel and Watson

Crick and Franklin

Woese and Hooke

Darwin and Wallace

Resistant bacteria survive and reproduce while non-resistant ones are killed

The bacteria deliberately choose to become resistant when exposed to the drug

The antibiotic itself directly creates the resistance inside each bacterium

All of the bacteria are killed off completely

Dolly and Lassie

Ardi and Lucy

Rex and Bruno

Flora and Fauna

It shows that every single animal species has exactly the same limbs that always do exactly the same single job

It proves that animal species never change at all over very long periods of time

It shows the same basic bone pattern in different species used for different jobs, suggesting a common ancestor

It is a limb structure that is only ever found in modern humans and nowhere else

Looking only at the overall size of each organism

Counting the number of legs each organism has

Studying only where the different organisms live

Genetic analysis of cells and their molecules

It reduces genetic variation, leading to inbreeding and health problems

It increases the genetic variation in the breed far too much over time

It always produces offspring that are completely sterile and cannot breed

It transfers genes directly from one species into another species

It produces a wide range of useful genetic variation between the new plants

It makes many genetically identical copies quickly from a few cells

It removes the need to use any plant cells at all in the process

It permanently changes and rearranges the plant's own genes

A restriction enzyme that cuts the DNA

A ribosome that builds the protein chain

A vector such as a plasmid or virus

A red blood cell taken from the host

They always reduce the biodiversity of the surrounding wild plant habitat

They cannot be eaten safely by people or by farm animals at all

They completely remove the need for any soil when growing crops

They can give higher yields, resist pests or contain extra nutrients

GM genes could spread to wild plants and biodiversity could fall

They always grow far too slowly to ever be of any use to farmers

They are completely unable to resist any insect pests at all

They contain no genetic material of any kind inside their cells

Only the benefits of growing the crops

Both benefits and risks, with a supported judgement

Only the risks of growing the crops

A single labelled diagram of the crop plant and nothing else at all