Topic 4- Natural Selection And Genetic Modification

Question 1

Common ancestor

Answer 1

When a species evolves into 2 species

Question 2

Selelctive breeding

Answer 2

When humans artificially selsect animals that are going to breed

Question 3

Advantages of selective breeding

Answer 3

• animals thats produce more meat
• crops with disease resistance
• dogs with good temperaments
• plants that produce bigger fruit

Question 4

Disadvantages of selective breeding

Answer 4

• reduces gene pool
• inbreeding can cause health conditions
• new diseases can kill large amounts of the species

Question 5

Pentadactyl limb

Answer 5

Limbs with 5 fingers, shows that an animal has a common ancestor as they have similar bones