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Previous ib exam essay questions unit 2

Unit 10 Use these model essay questions and responses to prepare for essay questions on your in-class tests, as well as the IB Examination, Paper 3. The answers following the questions are the markscheme ideal responses used to evaluate student examination responses. Outline the experiments of Miller and Urey into the origin of organic compounds on Earth. Outline the methods used by Miller and Urey in their experiments into the origin of organic compounds on Earth.

Outline the conclusion that Miller and Urey drew from their experiments. Discuss the possible role of RNA in the origin of life on Earth.

  • Discuss briefly the effects of inhibitory psychoactive drugs;
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Answer the following questions concerning endosymbiotic theory. Identify which one of the five kingdoms of living organisms was the first to appear on Earth. State one organelle, apart from chloroplasts, which is part of the endosymbiotic theory. State three kingdoms in which this organelle is found. State two characteristics of mitochondria which support the idea that they were once independent prokaryotes.

Discuss the definition of the term species. Discuss how isolation can lead to speciation.

Previous ib exam essay questions unit 9

Discuss how different types of isolation contribute to speciation. Discuss the theory that evolution occurs by punctuated equilibrium. Compare evolution by punctuated equilibrium with evolution by gradualism. Unit 11 Use these model essay questions and responses to prepare for essay questions on your in-class tests, as well as the IB Examination, Paper 3. Outline the method for the dating of rocks and fossils using radioisotopes, with reference to 14C and 40K.

Describe the major anatomical features that define humans as primates. Outline the trends illustrated by the fossils of Ardipithecus, Australopithecus and Homo. Discuss the incompleteness of the fossil record and the resulting uncertainties with respect to human evolution. Discuss the the correlation between the change in diet and increase in brain size during hominid evolution. Distinguish between genetic and cultural evolution.

  1. Ib biology test preparation biology for life ib exam test preparation 40 multiple-choice questions on core and ahl material. Explain how a non-mylenated neuron can maintain a resting potential and undergo an action potential.
  2. Dissertation repository not found telugu essay writing books pdf balaguruswamy essay autocratic leadership style books previous ib exam essay questions unit 9. Answer the following questions concerning endosymbiotic theory.
  3. Many processes in living organisms, including ventilation and gas exchange, involve moving materials.
  4. Six steps to writing a good tok essay. Explain how the nerve impulse passes along a neuron.

Discuss the relative importance of genetic and cultural evolution in the recent evolution of humans. Describe the adaptations for tree life which are found both in humans and in other primates.

Explain the Hardy-Weinberg equation and why it is used. State three conditions under which the Hardy-Weinberg Principle does not operate.

Outline the value of classifying organisms. Explain the biochemical evidence for the common ancestry of living organisms.

Previous IB Exam Essay Questions: Unit 1

Explain how variations in specific molecules can indicate phylogeny. Discuss how biochemical variations can be used as an evolutionary clock. Distinguish, with examples, between analogous and homologous characterisitcs 4 marks analogous characteristics: Discuss the relationship between cladograms and the classification of living organisms.

Unit 12 Use these model essay questions and responses to prepare for essay questions on your in-class tests, as well as the IB Examination, Paper 2. The answers following the questions are the mark-scheme ideal responses used to evaluate student examination responses. Draw a labeled diagram of the human digestive system.

Describe the role of enzymes in the digestion of proteins, carbohydrates and lipids in humans. Examples of specific enzymes: Draw a diagram of a villus in vertical section. State the sources, substrate, product, and optimum pH conditions for the enzyme amylase.

  • Explain, using examples, how inhibitory psychoactive drugs affect brain physiology;
  • Compare the composition of the blood arriving at the kidney via the renal artery with the composition of the blood carried away from it in the renal vein;
  • Distinguish between active and passive movements of materials across plasma membranes, using named examples.

Explain how the structure of the villi in the small intestine are related to absorption of digested food. Describe the role of enzymes in digestion with reference to two named examples.

Draw a labelled diagram to show the internal structure of the heart. However, it is not necessary to show the cordae tendinae. Draw a labelled diagram of the heart showing all four chambers, associated blood vessels and valves.

Outline the events that occur within the heart, which cause blood to move around the body. Explain the relationship between the structure and function of arteries, capillaries and veins. Draw a simple diagram of the gas exchange system in humans. Describe the mechanism of ventilation in the human lung. Describe the need for a ventilation system.

Explain the need for, and mechanism of, ventillation of the lungs in humans.

Previous ib exam essay questions unit 9

Many processes in living organisms, including ventilation and gas exchange, involve moving materials. State the differences between ventilation and gas exchange in humans. Describe homeostasis in relation to blood glucose concentration in humans. Define, with examples, the term homeostasis. Explain how blood glucose concentration is controlled in humans.

Describe the response of the human body to low external temperatures. Outline how the skin and mucous membranes prevent entry of pathogens into the body. Discuss the benefits and dangers of vaccinations against bacterial and viral infections. Explain the principle of immunization against bacterial or viral diseases.

Define the terms active and passive immunity. Explain the role of antibody production with regard to vaccinations. Explain the production of antibodies against a pathogen.

Explain why antibotics are used to treat bacterial but not viral diseases. Describe the production of monoclonal antibodies. Outline the role of fibrinogen. Describe the process of clotting. Explain the role of antibody production and the principle of vaccination in immunity. Polio is a viral disease which affects the nervous system.

Describe the different ways in which the body could acquire immunity to this disease. Discuss the cause, transmission and social implication of AIDS 8 marks the answer must include at least one reference to cause, transmission, and social implications in order to receive full marks cause: Tuberculosis is a disease of the ventilation system.

Explain how white blood cells attack the pathogens that cause this disease. Blood vessels carry blood to and from the kidney. Draw a labelled diagram to show the internal structure of the kidney, previous ib exam essay questions unit 2 the vessels that are connected to it. Explain briefly the function of the loop of Henle in the human kidney. Compare the composition of the blood arriving at the kidney via the renal artery with the composition of the blood carried away from it in the renal vein.

Define excretion and osmoregulation.

Ib biology sl essay questions

Unit 14 Use these model essay question responses to prepare for essay questions on your in class tests, as well as the IB Examination, Paper 2. These questions have appeared on recent IB examinations, exactly as shown below. Following each question is the markscheme answer which was used to evaluate student answers on the examination paper. Outline the general organization of the nervous system.

Draw a diagram to show the structure of a motor neuron. Outline the changes that lead to the depolarization of an axon as an action potential travels along a neuron. Explain how the nerve impulse passes along a neuron. Explain how a non-mylenated neuron can maintain a resting potential and undergo an action potential.

  • Discuss the theory that evolution occurs by punctuated equilibrium;
  • All tests will consist entirely of previous ib exam questions all previous essay questions will be provided at the end of each unit;
  • Identify which one of the five kingdoms of living organisms was the first to appear on Earth;
  • Explain the need for, and mechanism of, ventillation of the lungs in humans;
  • Outline the experiments of Miller and Urey into the origin of organic compounds on Earth;
  • Unit 12 Use these model essay questions and responses to prepare for essay questions on your in-class tests, as well as the IB Examination, Paper 2.

Explain how a nerve impulse is transmitted from a neuron to a muscle. Describe the principles of synaptic transmission in the nervous system.

Explain the process of synaptic transmission. Draw a labelled diagram of the human elbow joint.

Previous IB Exam Essay Questions: Unit 11 - Course

Describe the roles of structures at the elbow joint, including nerves, muscles and bones, in movements of the human forearm. Describe the roles of nerves, muscles and bones in producing movement. Explain how a muscle fibre contracts, following depolarization of its plasma membrane. Explain how skeletal muscle contracts. Explain the process of muscle contraction. Neurobiology Use these model essay question responses to prepare for essay questions on your in class tests, as well as the IB Examination, Paper 3.

Compare the sensitivities of rod and cones cells to differences in light. Draw a labelled diagram showing the main parts of the human brain. State one function for each of two structures labelled in your diagram.