OCR Biology Past Paper PDF

Unit A: Topic 1-3 Review Topic 1 - Biological Diversity and Survival 1. What does the term biological diversity refer to? 2. What is the difference between abiotic and biotic? 3. Explain the difference between structural and behavioral adaptations with...

Unit A: Topic 1-3 Review Topic 1 - Biological Diversity and Survival 1. What does the term biological diversity refer to? 2. What is the difference between abiotic and biotic? 3. Explain the difference between structural and behavioral adaptations with examples of each. 4. What is the value of variation? 5. Explain the arrangement of species: a. Individual b. Population c. Community d. Ecosystem 6. Explain the difference between variation in a species and variation between species. 7. What is the 7 step Classification System used by scientists? (name each of the 7 steps) 1 2 3 4 5 6 7 8. What makes a “species” unique? 9. What is Speciation? Topic 2 - Habitat and Lifestyle 1. Explain what is included in an organism’s niche. 2. What is resource partitioning? 3. Explain resource partitioning in the spruce tree and briefly explain what warbler populations would be affected directly, if lightning hit the top part of the tree. (p. 18)  4. Why is there little diversity and large populations in Northern Canada and high diversity with small populations in Central and South America? (include: “broad niche” and “narrow niche”) 5. Explain the difference between the type of niche specialists and generalists have. 6. Give an explanation and an example of each type of symbiotic relationship: a. Commensalism b. Mutualism c. Parasitism d. Interspecies competition 7. What is “Natural Selection”? Give one example of natural selection: Topic 3 - Passing It On 1. Briefly describe the difference reproductive processes that can occur asexually. a. Binary Fission b. Spore Production c. Cuttings d. Budding e. Vegetative Reproduction f. Zoospore 2. Explain the process of sexual reproduction in plants and label the parts of the flower. 3. Explain the process of sexual reproduction in animals. 4. Explain the process of conjugation in bacteria. 5. Some organisms can reproduce sexually and asexually. Explain the advantages and disadvantages of each process