Topic 4 - Natural Selection and Genetic Modification

Question 1

Advantage and Disadvantage of introducing Bacillun Thuringiensis into a crop plant

Answer 1

A - Crop then produces toxin which kills insects that would normally eat it
D - GM crops can be very expensive and so some farmers can’t afford it

Question 2

Is prokaryotes simple or complex?

Answer 2

Prokaryotes are simple

Eukaryotes are complex

Question 3

Darwins finches are an example of what?

• selective breeding
• geographical isolation
• hybridisation
• the development of ring species

Answer 3

Geographical isolation

Question 4

How does the pendetactyl limb prove evolution?

Answer 4

Pendetactyl limb - limb that has 5 digits
Present in many species such as mammals
High level of similarity shows that we all have evolved from a common ancestor

Question 5

Steps to produce Tegon the genetically engineered beagle?

Answer 5

1 - Remove diploid nucleus from genetically engineered cell
2 - donor egg is enucleatedt
3 - Diploid nucleus is inserted into the egg cell
4 - Division of nucleus is stimulated by electric shock
5 - cells put into surrogate mother
6 - Cells form an embryo, then after pregnancy time Tegon is born.

Question 6

What are the 5 kingdoms?

Answer 6

Animals
Plants
Fungi
Prokaryotes
Protists

Question 7

What are the 3 domains?

Answer 7

Archea - primitive bacteria which lives in very hot conditions
Eukaryotes - don’t have a nucleus enclosed in membranes(protists, fungi, plants and animals)
Bacteria - bacteria