OCR A2 Biology 2

Welcome to your OCR A2 Biology 2

1. Induced pluripotent stem cells (iPS cells) can be produced from ____________.
2. A process which does not facilitate natural selection.
3. The primary source of genetic variation within a population of a species.
4. Choose the correct order of formation.
5. Which of the following geographical barriers can lead towards allopatric speciation?

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