1. The colour differences between the kittens is an example of..
A. discontinuous variation
B. continuous variation
C. selective evolution
D. random assortment
2. Two of the kittens grew to be much bigger than the other kittens. This could be due to:
A. Genes inherited from their parents
B. Eating more food than their siblings
C. Moving around more than their siblings
D. A combination of both genetic differences and eating more food.
3. Which of these examples of variation in humans are solely caused by genetic differences?
A. Obesity and hair colour
B. Gender and blood group
C. Height and natural eye colour
D. Obesity and natural eye colour
4-6. A plant grower’s crop was being eaten by a species of herbivorous insect so he decided to spray the crop with a pesticide. He repeated the process later in the year when the insects returned.
Diagrams of the leaves before and after applying pesticide are shown in this table:
Before pesticide was applied
After pesticide was applied
Plant grower finds crop attacked by insects and sprays the crop.
1.
2.
Later in the year there were more insects on his crop so he sprayed again.
3.
4.
Each dot represents 1 living insect.
4. How many varieties of the insect are there in this example?
A. one
B. Two
C. Three
D. Nine
5. Select the best statement to explain why after the first spraying 75% of the ‘black’ variety died but all the red ones survived.
A. ‘Red’ variety ate the ‘black’ variety of the insect
B. ‘Red’ variety escaped the pesticide
C. The ‘red’ variety are poisonous so birds don’t eat them.
D. ‘Red’ variety was resistant to the pesticide but the pesticide killed the ‘black’ variety.
6. How might the resistance to the pesticide have occurred?
A. By a mutation in the insect’s genome
B. By interbreeding
C. By the application of the pesticide
D. By changes in the weather.
7. Charles Darwin put forward a theory for evolution. According to Darwin how do new species evolve?
A. By adapting to the environment
B. By selective breeding
C. By natural selection
D. By chance
8. Which statement is NOT involved in the process of evolution through natural selection.
A. Within a breeding population there is variation
B. Organisms compete for resources such as food, habitat, mate.
C. Those varieties of a species that are better suited to the changing environmental pressures survive and mate.
D. As the environment changes an organism adapts to the change.
9. Many ‘superbugs’ are resistant to antibiotics. The table lists 4 stages in the evolution of antibiotic resistance.
1
When resistant bacteria infect another person the antibiotics will not kill the bacteria.
2
The resistant bacteria reproduce and pass on the resistant form of the gene.
3
A patient is infected with bacteria. Through mutations different varieties of the bacteria have occurred.
4
The patient is given antibiotics. Those bacteria that are resistant survive. The other bacteria die.
Which is the correct order of to explain the evolution of resistance to an antibiotic?
A. 1, 2, 3, 4
B. 2, 3, 4, 1
C. 3, 4, 2, 1
D. 3, 2, 4, 1
10. How can antibiotic resistance be reduced?
A. Take antibiotics for all illnesses
B. Only take antibiotics until you feel better
C. Take antibiotics only when really needed and complete the full course.
