DP Biology Questionbank

Description

Overview of the essential ideas for this topic.

4.1: The continued survival of living organisms including humans depends on sustainable communities.

4.2: Ecosystems require a continuous supply of energy to fuel life processes and to replace energy lost as heat.

4.3: Continued availability of carbon in ecosystems depends on carbon cycling.

4.4:  Concentrations of gases in the atmosphere affect climates experienced at the Earth’s surface.

Directly related questions

• 15M.1.HL.TZ1.18: Human activity leading to the emission of greenhouse gases may be a cause of global...
• 15M.2.SL.TZ2.1f: Predict with a reason, using the data, which district has most farmland.
• 15M.2.SL.TZ2.3b (i): Identify a food chain with four or more organisms from the forest food web.
• 15M.2.SL.TZ2.3b (ii): Deduce the trophic level of each organism identified in your food chain from (b)(i).
• 15M.1.HL.TZ2.15: The table shows the monthly CO2 concentrations in mg L–1 taken at two monitoring stations. What...
• 13M.2.HL.TZ1.4a: Distinguish between autotrophs and heterotrophs.
• 11M.1.HL.TZ1.16: What is a community composed of? A. Habitats B. Populations C. Abiotic factors D. Biotic and...
• 11M.1.SL.TZ2.29: Which group of organisms in the carbon cycle converts carbon into a form that is available to...
• 11M.3.SL.TZ1.20b: Explain why the carnivores in an ecosystem tend to be fewer in number and have a smaller biomass...
• 11M.3.SL.TZ1.19a: State the mean terrestrial invertebrate biomass measured in August.
• 11M.3.SL.TZ1.19b: Describe the trend in the aquatic invertebrate flux.
• 12M.2.HL.TZ1.1f: Suggest one reason for the high LCTw measured for the female dolphin.
• 12M.2.HL.TZ1.7b: Outline the causes and consequences of the enhanced greenhouse effect.
• 12M.1.HL.TZ2.15: What best describes the mode of nutrition of a heterotroph? A. It ingests only non-living...
• 12M.1.SL.TZ1.19: What is recycled in an ecosystem? A. Nitrogen, carbon and energy are all recycled. B. Nitrogen...
• 12M.2.SL.TZ1.1b: Compare the distribution of dolphins in summer and winter.
• 12M.1.SL.TZ1.18: In a pond, two species of fish feed on insects and worms. The insects feed on the green plants...
• 10M.2.HL.TZ2.1h: Suggest one advantage and one disadvantage for blood sampling rather than weighing birds to...
• 10M.2.HL.TZ2.8a: Describe the relationship between the rise in the concentration of atmospheric carbon dioxide and...
• 10M.2.SL.TZ1.1c (i): Calculate the percentage of deaths due to birds of prey.
• 12N.2.HL.TZ0.3a (ii): The greenhouse effect is a naturally occurring process. Explain how radiation of different...
• 09N.3.SL.TZ0.19b(i): Outline the relationship between ice cover and the mass of 14-day-old chicks on Coats Island.
• 09N.3.SL.TZ0.19c: Predict, with a reason, the change in the mass of chicks in the years ahead.
• 13N.3.HL.TZ0.10b: Outline the trends in North Sea cod spawning biomass between 1960 and 2000.
• 16M.1.HL.TZ0.24: The statement is about the role of some bacteria in ecosystems. What is the mode of nutrition...
• 16N.2.HL.TZ0.1g: Suggest another marine animal that has parts made of calcium carbonate and may therefore be...
• 16N.1.HL.TZ0.15: How is peat formed? A. From methanogenic archaeans under anaerobic and acidic conditions in deep...
• 16M.3.SL.TZ0.3b: Distinguish between the exchange of matter and energy with the surroundings in a closed mesocosm.
• 16M.2.SL.TZ0.3b: Using the diagram, explain the interaction of short and long wave radiation with greenhouse gases...
• 16N.2.SL.TZ0.7c: Draw a labelled diagram of a pyramid of energy.
• 16N.2.SL.TZ0.7a: Explain the processes by which energy enters and flows through ecosystems.
• 17M.2.SL.TZ1.1d.ii: Suggest reasons for the differences in the numbers of oysters drilled, as shown in the bar charts.
• 17M.2.SL.TZ1.3b: Outline reasons for the change occurring at Z. 
• 17M.3.HL.TZ1.3b: Mesocosm experiments using water from Narragansett Bay were completed in the laboratory during a...
• 15M.2.HL.TZ2.1b: Distinguish between changes in the surface area of sea ice in the Arctic and Antarctica.
• 15M.2.HL.TZ2.1d: Describe the trends in the length of the sea ice season around the Antarctic Peninsula and in the...
• 11M.3.SL.TZ1.19c: Suggest the relationship between defoliation and the amount of terrestrial invertebrates in the...
• 12M.1.HL.TZ2.16: The energy passing from the detritivores to the predatory invertebrates in this food web is 14...
• 12M.2.SL.TZ1.1a: State the largest number of dolphins counted in a single summer survey.
• 12M.3.SL.TZ2.18b: Explain the principles involved in the generation of methane from biomass.
• 09M.2.SL.TZ2.4b: Explain the shape of the pyramids of energy that are constructed by ecologists to represent...
• 09M.1.SL.TZ1.21: Why do food chains in an ecosystem rarely contain more than five organisms? A. Nutrients are...
• 09M.1.HL.TZ2.20: Why does the amount of CO2 fall between April and August? A. Seasonal increase in the rate of...
• 10M.1.SL.TZ1.19: What are the units of a pyramid of energy? A. kJ m-2 yr-1 B. kJ m-1 yr-1 C. J m-3 s-1 D. J m2 s-1
• 10M.2.SL.TZ2.1b: Discuss the relationship between sampling visits (V) and puddling time (T) in experiments 1, 2...
• 12N.2.HL.TZ0.3a (i): The greenhouse effect is a naturally occurring process. State one greenhouse gas.
• 12N.1.HL.TZ0.16: Which represents a correct food chain from this web? A. stickleback → midge larva → unicellular...
• 12N.1.HL.TZ0.14: The diagram shows the carbon cycle.  Which letter indicates respiration?
• 15N.1.SL.TZ0.20: Which process has the greatest relative role in transferring carbon? A. Decomposition B....
• 15N.1.HL.TZ0.16: Which hypothesis is supported by evidence from ecological research? A. Decomposers are the final...
• 13N.2.HL.TZ0.3b: Distinguish between the movement of energy and nutrients in an ecosystem.
• 16N.2.HL.TZ0.1e: Comment on whether the experimental data supports the observed data from the ocean.
• 17M.1.SL.TZ2.17: What is lost between trophic levels in ecosystems and cannot be recycled? A. Heat B....
• 17M.2.SL.TZ1.1d.iii: The radula in a gastropod is hard but not made of calcium carbonate. Outline how this statement...
• 17M.2.SL.TZ1.3c: The short-tailed albatross (Phoebastria albatrus) nests and breeds on remote low-lying coral...
• 17M.2.HL.TZ1.4b: Most of the surface of the Earth is covered with a wide diversity of ecosystems. Outline two...
• 17N.1.SL.TZ0.18: The diagram shows the carbon cycle. [Source: © International Baccalaureate Organization...
• 15M.2.HL.TZ2.1f: Discuss the use of Adélie penguins in studying the effects of global warming.
• 13M.2.HL.TZ1.4b: Define saprotroph.
• 13M.3.HL.TZ1.8a: One of the distinguishing features of the Archaea is that they are capable of inhabiting extreme...
• 13M.3.SL.TZ2.12c: Discuss the definition of the term species.
• 11M.3.HL.TZ1.10c: Suggest the relationship between defoliation and the amount of terrestrial invertebrates in the...
• 12M.2.HL.TZ1.1b: Calculate the mean number of dolphins counted per survey for the winter season.
• 12M.2.HL.TZ1.1d (ii): Suggest one reason for the differences in distribution.
• 12M.1.HL.TZ1.14: In a pond, two species of fish feed on insects and worms. The insects feed on the green plants...
• 12M.1.HL.TZ2.17: To which trophic level do the butterflies belong? A. Producers B. Primary consumers C. Secondary...
• 12M.2.SL.TZ1.4a: Outline two possible consequences of global warming for organisms living in arctic ecosystems.
• 12M.2.SL.TZ2.7b: Outline the consequences of a global temperature rise on arctic ecosystems.
• 10M.2.HL.TZ2.1f: Explain the differences in the triglyceride level and butyrate level for the hermit thrush at...
• 10M.1.SL.TZ2.20: Which organism in this food web is both a secondary and tertiary consumer? A. Large crab B....
• 10M.1.SL.TZ2.21: Which gas will enhance the greenhouse effect if released into the atmosphere? A. Hydrogen B....
• 10M.2.SL.TZ2.6a: Describe the movement of energy and nutrients in an ecosystem.
• 10M.1.HL.TZ2.15: Which of the following is a consequence of global temperature rise on arctic ecosystems? A....
• 12N.2.HL.TZ0.3b (i): The enhanced greenhouse effect can cause a rise in atmospheric temperature. Outline two...
• 12N.1.HL.TZ0.15: What is the mode of nutrition of midge larva? A. AutotrophB. DetritivoreC. HeterotrophD. Saprotroph
• 12N.2.SL.TZ0.6a: Define habitat, population, community and ecosystem.          
• 10N.2.HL.TZ0.6b: Describe what is meant by a food chain and a food web.
• 09N.2.SL.TZ0.1c: Suggest reasons for the difference in numbers of L. strigatella between the areas where...
• 13N.1.SL.TZ0.18: Which pair of statements is correct?
• 09N.1.SL.TZ0.19: Global warming threatens the survival of Arctic foxes. Which of the following factors could be...
• 16N.2.SL.TZ0.1e: The trout, Oncorhynchus mykiss, that live in West Brush Creek and Cement Creek also feed on the...
• 16N.2.SL.TZ0.4c: Discuss whether or not horses and donkeys should be placed in the same species.
• 16N.2.HL.TZ0.1a: Calculate the difference in coral cover in 1996 and 2002. No working required.
• 16N.2.HL.TZ0.1h: Outline causes of ocean acidification.
• 16M.3.HL.TZ0.1a: State the relationship between atmospheric carbon dioxide and calcification rates.
• 17M.1.SL.TZ1.17: Euglena is a unicellular organism that feeds on bacteria and uses CO2 as a carbon source. Which...
• 17M.1.SL.TZ1.21: Cladograms can be created by comparing DNA or protein sequences. The cladogram on the left is...
• 17M.2.SL.TZ1.2d: Explain the role of decomposers in an ecosystem.
• 15M.2.SL.TZ2.3a: Describe what is meant by a food chain.
• 15M.2.HL.TZ2.1a: State the trend in the surface area of sea ice in the Southern Ocean around Antarctica.
• 13M.2.SL.TZ2.7b: Ecologists sometimes display data from an ecosystem using a diagram called a pyramid of energy....
• 13M.1.SL.TZ1.19: What is an ecosystem? A. An environment in which an organism normally livesB. A group of...
• 11M.3.HL.TZ1.10e: Allochthonous organisms are those which have migrated from one place to another, such as the...
• 12M.2.SL.TZ1.1c: Suggest one reason for the differences in distribution.
• 09M.1.SL.TZ2.23: The graph below shows variation in the concentration of CO2 in the atmosphere as measured at...
• 10M.2.SL.TZ1.1a: Outline the trends, over the period of time shown in the graph, in the number of grey partridges,...
• 10M.2.SL.TZ2.1c: Analyse the results for experiment 4.
• 11N.2.HL.TZ0.4 b: Suggest one type of organism that can be involved in process Z.
• 11N.1.HL.TZ0.22: Which term best defines a group of populations living and interacting with each other in an...
• 11N.1.SL.TZ0.20: Which of the following trophic groups include fungi? A. Detritivores B. Autotrophs C....
• 10N.2.SL.TZ0.5c: Explain the relationship between rises in concentration of atmospheric gases and the enhanced...
• 10N.2.HL.TZ0.6c: Explain the relationship between rises in concentration of atmospheric gases and the enhanced...
• 13N.2.SL.TZ0.5a: All organisms take in and also release carbon compounds. Draw a labelled diagram of the carbon...
• 13N.3.HL.TZ0.10d: Suggest one factor, other than sea surface temperature, that might influence the North Sea Cod...
• 09N.1.SL.TZ0.17: Zoophobas morio is an insect. Its larvae feed on bat feces in caves in Guatemala. What type of...
• 16M.1.SL.TZ0.17: Which category of organisms is correctly described by its method of nutrition and site of...
• 16N.1.SL.TZ0.17: What is the classification of an organism that is able to make organic compounds from inorganic...
• 16N.2.SL.TZ0.1d: Analyse the data to find the effect of flooding and tree felling by beavers on the activity of bats.
• 16N.1.HL.TZ0.16: What contributes to rising atmospheric concentrations of carbon dioxide and increases in average...
• 16M.3.HL.TZ0.1c: Outline one way in which reef-building corals are affected by increasing atmospheric carbon dioxide.
• 17M.1.SL.TZ2.27: The bacterium Neisseria gonorrhoeae causes infections related to the human reproductive system....
• 17M.2.SL.TZ1.1b: Outline the trends shown in the data in the graph.
• 17M.3.HL.TZ2.1b: Describe the relationship between gall diameter and percentage survival of E. solidaginis.
• 15M.1.SL.TZ2.17: Which statement describes the term species?A. Members of the same ecological communityB....
• 13M.1.SL.TZ2.18: What term can be used to describe clams that eat decaying plant matter? A. DetritivoresB....
• 11M.1.SL.TZ2.21: Which of the following ecological units includes abiotic factors? A. A community B. An...
• 12M.2.HL.TZ1.1g: Evaluate the hypothesis that water temperature determines the range and distribution of...
• 12M.2.HL.TZ1.1a: State the largest number of dolphins counted in a single survey.
• 12M.2.HL.TZ1.1d (i): Compare the distribution of dolphins in summer and winter.
• 12M.1.HL.TZ1.15: The fungus Calocera viscosa obtains its nutrients from decaying conifer trees. Which pair of...
• 12M.1.SL.TZ2.17: What best describes the mode of nutrition of a heterotroph? A. It ingests only non-living...
• 12M.1.SL.TZ2.20: What do records from the twentieth and twenty-first century show about the concentration of...
• 12M.2.SL.TZ1.5c: Explain the flow of energy between trophic levels in ecosystems.
• 09M.1.HL.TZ1.15: Slime moulds (Acrasiomycota) are protoctists. They feed on decaying organic matter, bacteria and...
• 09M.1.SL.TZ1.19: The following diagram shows part of a food web from Yellowstone Park. What would be the...
• 10M.2.HL.TZ2.8b: Outline the precautionary principle.
• 10M.2.HL.TZ2.1c: Compare the 17-year summary data for the hermit thrush and the magnolia warbler.
• 10M.2.HL.TZ2.1g: Scientists have hypothesized that the food quality is better at Site 1 than at Site 2. Evaluate...
• 10M.1.SL.TZ1.20: What is a potential consequence of the rise in global temperatures on the Arctic ecosystem? A....
• 10M.1.SL.TZ2.19: What will happen to the food web above if the sea otter disappears? A. Large fish increase and...
• 10M.2.SL.TZ1.1b (i): Identify the correlation between the density of grey partridges and birds of prey.
• 10M.2.SL.TZ2.1a: Identify the dissolved element always present in the three samples with most puddling time.
• 10M.1.HL.TZ1.16: What are the units of a pyramid of energy? A. kJ m-2 yr-1B. kJ m-1 yr-1 C. J m-3 s-1 D. J m2 s-1
• 09N.3.HL.TZ0.10b(ii): Suggest reasons for the relationship.
• 09N.3.SL.TZ0.19a(i): Outline the changes in ice cover shown in the data above.
• 09N.3.SL.TZ0.19b(ii): Suggest reasons for the relationship.
• 15M.2.SL.TZ2.1g: Discuss whether malaria could be reduced by replacing farmland with natural ecosystems and...
• 15N.1.SL.TZ0.1: Two populations of the same fish species were fed different diets to investigate the effect of...
• 13N.1.SL.TZ0.19: What are examples of greenhouse gases?A. Ethane and ozoneB. Methane and nitrogenC. Methane and...
• 09N.1.SL.TZ0.18: The diagram below shows some of the links in the carbon cycle. What processes are taking place...
• 16N.2.HL.TZ0.1i: Discuss the need for international cooperation to solve the problems of declining coral populations.
• 16N.2.SL.TZ0.1f: Identify an example of competition between organisms in this food web.
• 16M.2.HL.TZ0.7b: Outline how the energy flow through food chains limits their length.
• 16N.2.HL.TZ0.1b: Describe the evidence that the ocean temperature has an effect on coral cover.
• 17M.2.SL.TZ1.3a: State the type of wavelength of the radiation labelled X and Y. X:  Y: 
• 17M.2.SL.TZ1.1d.i: Deduce from the data in the bar charts which factors were and were not correlated significantly...
• 17M.3.HL.TZ1.13c: Distinguish between mutualism and parasitism, providing another example of mutualism and another...
• 17N.1.SL.TZ0.17: In an area of forest measuring 100 m by 100 m, samples were taken to estimate the number of...
• 17N.2.SL.TZ0.04b: Outline why the number of trophic levels is limited in a food chain.
• 15M.1.SL.TZ2.19: The following statements refer to a pyramid of energy. I. Some material is not assimilated by...
• 15M.2.SL.TZ1.7b: Aquatic and other environments are being affected by a global rise in temperature. Outline the...
• 13M.2.HL.TZ2.6b: Ecologists sometimes display data from an ecosystem using a diagram called a  pyramid of...
• 13M.1.HL.TZ2.15: The diagram is a representation of a carbon cycle.  Which arrow will reduce the greenhouse effect?
• 11M.3.HL.TZ1.10d: Suggest a possible explanation for the pattern in aquatic invertebrate flux to the forest seen...
• 12M.2.HL.TZ1.1e: Outline the relationship between body mass and LCTw for male dolphins.
• 12M.1.SL.TZ2.18: The energy passing from the detritivores to the predatory invertebrates in this food web is 14...
• 09M.2.SL.TZ2.7c: Explain how the emission of gases, both naturally and through human activity, can alter the...
• 09M.2.SL.TZ2.4a: Define the terms species, population and community. Species:   Population:     Community:
• 09M.1.HL.TZ2.19: What is the main cause of the increase in CO2 levels from 1960 to 2000? A. Burning fossil...
• 12N.1.HL.TZ0.13: The diagram shows a pyramid of energy for a wetland environment. What units would be appropriate...
• 12N.2.SL.TZ0.6b: Outline how energy flows through an ecosystem.        
• 10N.2.SL.TZ0.5b: Describe what is meant by a food chain and a food web.
• 09N.2.SL.TZ0.1a: State the effect that the exclusion of the oystercatchers had on the total number of limpets per m2.
• 15N.1.SL.TZ0.18: Which of the following describe(s) this spider? I. Primary consumer II. Heterotroph III....
• 15N.1.SL.TZ0.19: Based on their diet, the feces of spotted hyenas appear white because of high calcium content....
• 15N.1.SL.TZ0.21: What contributes to the enhanced greenhouse effect? A. Ozone from violent thunderstorms B....
• 15N.1.HL.TZ0.1: Two populations of the same fish species were fed different diets to investigate the effect of...
• 15N.1.HL.TZ0.15: Which of the following describe(s) this spider? I. Primary consumer II. Heterotroph III....
• 13N.1.SL.TZ0.17: What is a population?A. Organisms of the same genus living in an ecosystemB. Organisms living...
• 13N.3.HL.TZ0.10a.i: State the sea surface temperature when the North Sea cod spawning biomass was the highest, giving...
• 13N.3.HL.TZ0.10a.ii: State the North Sea cod spawning biomass when the sea surface temperature was the lowest, giving...
• 13N.3.HL.TZ0.10c: Evaluate the evidence provided by the data, for the prediction that North Sea cod will become...
• 13N.3.SL.TZ0.17c: Explain the formation of methane from biomass.
• 16N.1.SL.TZ0.18: What restricts the length of a food chain? A. Energy losses between the trophic levelsB. A...
• 16N.2.HL.TZ0.1f: (i) Describe the trend in calcification when the pH is decreased at 25 –26°C. (ii) In...
• 16M.3.SL.TZ0.3a: State the relationship between atmospheric carbon dioxide and calcification rates.
• 17M.2.SL.TZ1.1a: Outline how acidified sea water could affect the shells of the oyster.
• 17M.2.SL.TZ2.6c: Discuss the processes in the carbon cycle that affect concentrations of carbon dioxide and...
• 17M.2.HL.TZ2.4c: Outline the energy flow through this food web.
• 17M.2.HL.TZ2.4a.i: Using the food web, identify a detritivore.
• 17N.2.SL.TZ0.07c: Describe the process of peat formation.
• 15M.2.SL.TZ2.1e: Besides farmland, identify which two ecosystems have the greatest total area with a high...
• 15M.3.SL.TZ1.20c: Outline the abiotic factors that affect the distribution of plant species in an ecosystem.
• 13M.1.HL.TZ1.17: Global warming caused by the enhanced greenhouse effect is likely to have major consequences for...
• 13M.1.SL.TZ2.19: At each trophic level energy is lost. How is this energy regained by the ecosystem? A. HeatB....
• 11M.2.HL.TZ2.4c: Discuss reasons why the levels of a pyramid of energy differ in size.
• 11M.3.HL.TZ1.10a: State the mean terrestrial invertebrate biomass measured in August.
• 11M.3.HL.TZ1.10b: Describe the trend in the aquatic invertebrate flux.
• 12M.2.HL.TZ1.1c: Compare the data for the dolphin populations in winter and summer.
• 12M.1.SL.TZ2.21: What term refers to organisms of the same species, living in a specified area and time? A....
• 09M.2.SL.TZ1.4a: Below is a graph of atmospheric CO2 levels measured at Mauna Loa Observatory, Hawai’i. Explain...
• 09M.2.SL.TZ1.4b: Outline the precautionary principle.
• 10M.2.HL.TZ2.1b: Using the data from the table, calculate the percentage difference in mean bird mass for the...
• 10M.2.HL.TZ2.1a: Considering all the birds sampled, identify which species was sampled the most and which was...
• 10M.2.HL.TZ2.1d: Evaluate the one season data for the hermit thrush and the American robin with regard to average...
• 10M.2.HL.TZ2.1e: Describe, using the triglyceride levels graph, the results at Site 1 and Site 2 for all of the...
• 11N.2.HL.TZ0.4 a: State the process occurring at X and Y.  X:...
• 11N.2.SL.TZ0.3b (i): Construct a possible food chain using three of the organisms shown opposite, stating the trophic...
• 09N.3.HL.TZ0.10a(i): Outline the changes in ice cover shown in the data above.
• 09N.3.HL.TZ0.10a(ii): Suggest one reason for the changes in ice cover.
• 09N.3.HL.TZ0.10c: Predict, with a reason, the change in the mass of chicks in the years ahead.
• 13N.1.HL.TZ0.16: The following shows an energy pyramid.How is energy lost between the trophic levels?A....
• 16M.1.SL.TZ0.18: What limits the length of food chains in an ecosystem? A. The size of individual organismsB....
• 16M.1.HL.TZ0.23: Which are characteristics of a species? I. The potential to interbreed to produce fertile...
• 16N.2.HL.TZ0.1c: Suggest causes for the changes in ocean temperature.
• 16N.2.SL.TZ0.1b: Describe the effect dams have on water temperature.
• 16N.2.SL.TZ0.1a: Calculate the difference in the mean dry mass of mayflies upstream and downstream of Cement Creek...
• 16M.3.HL.TZ0.1b: Suggest one advantage of using a mesocosm in this experiment.
• 17M.1.HL.TZ1.16: Methanogens produce methane gas. What is this gas converted to in the atmosphere? A. Carbon...
• 17M.1.SL.TZ1.19: Which characteristic of water vapour classifies it as a greenhouse gas? A. It absorbs and then...
• 17M.1.SL.TZ2.18: What favours the production of peat? I. Presence of organic matter II. Anaerobic...
• 17M.1.HL.TZ2.23: What favours the production of peat? I. Presence of organic matter II. Anaerobic...
• 17M.2.SL.TZ1.1c: Estimate how much smaller drilled oysters raised in seawater at a high CO2 concentration were...
• 17M.2.HL.TZ1.1f.ii: Suggest a reason for the greater expression of the gene for the urea transporter after an...
• 17M.3.SL.TZ2.1c: Predict the effects of global warming on aerobic respiration in fish. 
• 15M.1.HL.TZ1.16: What is the best definition of the greenhouse effect in the Earth’s atmosphere?A. A naturally...
• 15M.1.SL.TZ2.20: The table shows the monthly CO2 concentrations in mg L–1 taken at two monitoring...
• 15M.2.SL.TZ2.3c: State one reason that the population of mountain lions is smaller than the populations of other...
• 15M.2.HL.TZ2.1c: Discuss the data as evidence of global warming.
• 15M.2.HL.TZ2.1e: Analyse the trends in colony size of the Adélie penguins in relation to the changes in the sea ice.
• 15M.1.HL.TZ2.16: The image shows an Arctic food web. What is the role of the Arctic hare? A. DetritivoreB....
• 13M.1.HL.TZ1.16: In ecosystems the amount of energy that passes from one trophic level to the next is called the...
• 13M.2.SL.TZ1.6b: Explain how the process of photosynthesis affects carbon dioxide concentrations in the atmosphere...
• 11M.1.HL.TZ1.18: Which of the following are greenhouse gases? I. Oxides of nitrogen II. Carbon dioxide III....
• 11M.1.SL.TZ1.20: Which of the following is the best definition of a population? A. A group of individuals that...
• 11M.3.SL.TZ1.19d: Suggest a possible explanation for the pattern in aquatic invertebrate flux to the forest seen...
• 12M.2.HL.TZ1.1h: Explain how an increase in water temperature due to global warming could affect the distribution...
• 12M.1.HL.TZ1.16: What is an example of the precautionary principle? A. Avoiding cigarettes as they increase the...
• 09M.1.HL.TZ2.21: The scarlet cup fungus (Sarcoscypha coccinea) obtains its nutrition from decaying wood by...
• 10M.1.SL.TZ1.18: What is a community? A. A group of organisms living and interacting in the same trophic level B....
• 10M.2.SL.TZ1.1b (ii): Suggest a hypothesis to account for this correlation.
• 10M.2.SL.TZ1.1c (ii): Using the data provided, discuss the causes of the correlation between the density of grey...
• 11N.2.HL.TZ0.4 c: Explain the relationship between the rise in concentration of atmospheric carbon dioxide and the...
• 11N.1.HL.TZ0.25: What is a consequence of a global temperature rise on arctic ecosystems? A. Decrease in CO2...
• 11N.2.SL.TZ0.3b (ii): State the initial energy source of the food chain constructed in (b)(i).
• 12N.2.HL.TZ0.3b (ii): The enhanced greenhouse effect can cause a rise in atmospheric temperature. Outline one effect...
• 09N.3.HL.TZ0.10b(i): Outline the relationship between ice cover and the mass of 14-day-old chicks on Coats Island.
• 09N.3.SL.TZ0.19a(ii): Suggest one reason for the changes in ice cover.
• 15N.1.HL.TZ0.17: What contributes to the enhanced greenhouse effect? A. Ozone from violent thunderstorms B....
• 15N.2.SL.TZ0.2d(i): Saprotrophic organisms, such as Mucor species, are abundant in soils. Define saprotrophic...
• 15N.2.SL.TZ0.2d(ii): State one role of saprotrophic organisms in the ecosystem.
• 09N.1.HL.TZ0.16: How is energy passed from one trophic level to the next? I. FoodII. LightIII. Heat A. I onlyB....
• 16M.1.HL.TZ0.25: The diagram represents a pyramid of energy. What level does the letter X represent? A....
• 16N.2.SL.TZ0.1g: The North American beaver (Castor canadensis) was introduced to islands adjacent to Argentina and...
• 16N.2.HL.TZ0.8c: Describe how energy flows through and is used by organisms in ecosystems.
• 16N.2.SL.TZ0.1c: The graph shows the mean dry mass of mayflies relative to the water temperature in their...
• 16N.2.HL.TZ0.1d: Identify one advantage of conducting this experiment in the laboratory rather than in the ocean.
• 17M.1.SL.TZ1.18: The diagram shows a version of the carbon cycle. What is indicated by the numbers?
• 17M.1.SL.TZ2.19: By which mechanism do greenhouse gases contribute to global warming? A. Their higher...
• 17M.1.HL.TZ2.22: The image shows a transect through a stream and a field. Which calculation would test for the...
• 17M.2.SL.TZ1.1e: Using all the data, evaluate how CO2 concentrations affect the development of oysters and their...
• 17M.2.HL.TZ2.4a.ii: Using the food web, identify a saprotroph.