January 18, 2018 | Author: Anonymous | Category: Science, Health Science, Immunology
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1. Polar bears and camels live in very different habitats. Both are adapted however to the temperatures of their respective environments. Compare and contrast how each species has responded to the temperature in their environment. [3 marks]

4. Why does a person running a marathon, on a hot day, lose more water from their body than usual. [3 marks]

2. There are two main types of cell in the human body: body cells and sex cells. How is genetic information stored in them both, and what is the key difference between them? [4 marks]

5. There are two methods in which messages can be sent around the body, telling it what to do. Evaluate the ways in which information can be sent around the body (H). [4 marks]

7. During times of fear or anxiety adrenaline causes the heart to beat faster. Explain what adrenaline is and how it reaches the heart? [3 marks]

10. Describe the general effects of an illegal drug on a persons’ body. [3 marks]

8. Evaluate the action of auxin in the shoots and roots of plants. [5 marks]

3. Describe the main differences between sexual and asexual reproduction. [2 marks]

6. Explain how plants in a desert environment cope with limited rainfall. [3 marks]

B1 Revision Question Template

9. List two biotic factors and two abiotic factors in an environment. [2 marks]

12. In the menstrual cycle, eggs are released form the ovaries. Hormones are involved in this process. What is the sequence of steps which leads to an egg being released from the ovaries? [4 marks] 11. An impulse fires along the sensory neurone of the optic nerve. Explain what may have caused this response. [2 marks]

13. A young bird falls from its nest and unfortunately dies. No other animal eats it. Explain the ways in which the carbon stored in this dead organic matter can be returned to the atmosphere. [4 marks]

16. What is a pathogen? [1 mark]

17. Antibodies and antitoxins combat different types of pathogens and in different ways. Compare and contrast the action of these two types of immune response. [4 marks]

20. What is evolution? [2 marks]

23. Fossils provide evidence of evolutionary relationships between modern and extinct species. Explain why fossil evidence is often difficult to interpret. [2 marks]

14. In a grassland environment rabbits happily graze on large quantities of grass. However, a predatory fox eats rabbits. This fox is infested with fleas. Draw and label a pyramid of numbers to represent the feeding relationships in this environment. [2 marks]

15. Draw and pyramid of biomass to represent the example food chain outlined in question 14. Explain any differences in the shape of this pyramid. [4 marks]

18. The Golden Tamarin is a critically endangered species of monkey – less than 50 exist in the wild. Recently, embryonic transplantation has been used to try and increase their numbers, using the Common Tamarin as a donor and surrogate. b) The offspring produced are a) Outline the method used in this process. [5 marks] genetically identical to each other, but have characteristics of both the Golden and Common Tamarin. Why is this? [2 marks]

21. A species of moth (the peppered moth) lives in woodland downwind from a nearby industrial estate. Deposits of soot accumulate on the bark of the tress here. In 2002, shortly after the estate was built, the moth population was made up of white coloured individuals. When resampled again in 2012 however, the majority of moths were all of a new dark coloured form. Explain how this change may have arisen. [5 marks]

19. The leaf of a plant is exposed to light rays from the sun amounting to 600kJ of energy. Only 15kJ of this is used by the plant in photosynthesis. What is the plant’s energy efficiency? [2 marks]

22. Outline a) how bacteria have been genetically engineered to produce human insulin, and b) how the insulin is made. NB. The sequence on the poster summary is not in the correct order! [4 marks]

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