OCR A2 Biology 2

Welcome to your OCR A2 Biology 2

1. Choose the correct order of formation.
2. A disorder caused by gene mutation.
3. Which of the following geographical barriers can lead towards allopatric speciation?

a) Rivers
b) Mountain ranges
c) Continental drift
d) Small pond
4. A behavioural barrier which could cause sympatric speciation.
5. Which type of stem cells are used in treating human disorders?
6. A mutated gene that causes cancer.
7. Which of the following is not a mutagen?
8. Select the incorrect statement about frameshift mutation.
9. Select the incorrect statement regarding allopatric speciation.
10. A process which does not facilitate natural selection.
11. Which disorder proves to be an example of the relationship between a gene, an enzyme and a human phenotype?
12. Change in allele frequencies due to a new environmental factor or a new allele.
13. The mark-release-recapture method of sampling is used among __________.
14. An example of multipotent cells.
15. Unique species of plants and animals in the Hawaiian and Galapagos islands is an example of ____________.
16. A process which does not facilitate natural selection.
17. Select the correct statements from the following.

a) Fish populations can be preserved if quotas are observed.
b) Bioaccumulation is when plants are produced in large numbers within an ecosystem.
c) Forests can be preserved if the trees are replanted.
d) Sometimes there are tensions between conservation efforts and the needs of local communities.
18. A group of scientists found out the estimated number of meerkats in an area to be 2992 using the mark-release-capture technique. The number caught and marked in the first sample was 151. The number caught in the second sample was 240. How many was marked in the second sample?
19. Induced pluripotent stem cells (iPS cells) can be produced from ____________.
20. The primary source of genetic variation within a population of a species.
21. Within a population of rabbits, the colour black (B) is dominant over the colour white (b). And, 30% of all rabbits are white. What is the percentage of heterozygous rabbits in the population?