| Date | May 2010 | Marks available | 1 | Reference code | 10M.1.SL.TZ2.20 |
| Level | Standard level | Paper | Paper 1 | Time zone | Time zone 2 |
| Command term | Identify | Question number | 20 | Adapted from | N/A |
Question
Which organism in this food web is both a secondary and tertiary consumer?
A. Large crab
B. Small herbivorous fish
C. Shark
D. Microscopic planktonic algae
Markscheme
A
Examiners report
These were second and third easiest question of the exam. This means they were not good discriminators, as almost every candidate had the correct answer. In response to the G2 comments, obviously the candidates had no trouble with the food web.
Syllabus sections
Show 53 related questions
- 17M.3.HL.TZ1.13c: Distinguish between mutualism and parasitism, providing another example of mutualism and...
- 17M.2.HL.TZ2.4c: Outline the energy flow through this food web.
- 17M.2.HL.TZ2.4a.ii: Using the food web, identify a saprotroph.
- 17M.2.HL.TZ1.1f.ii: Suggest a reason for the greater expression of the gene for the urea transporter after an...
- 17M.2.SL.TZ1.2d: Explain the role of decomposers in an ecosystem.
- 17M.2.SL.TZ1.1c: Estimate how much smaller drilled oysters raised in seawater at a high CO2 concentration were...
- 17M.1.SL.TZ2.27: The bacterium Neisseria gonorrhoeae causes infections related to the human reproductive...
- 17M.1.SL.TZ2.17: What is lost between trophic levels in ecosystems and cannot be recycled? A. Heat B....
- 17M.1.SL.TZ1.21: Cladograms can be created by comparing DNA or protein sequences. The cladogram on the left is...
- 16M.2.HL.TZ0.7b: Outline how the energy flow through food chains limits their length.
- 16N.2.HL.TZ0.8c: Describe how energy flows through and is used by organisms in ecosystems.
- 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.
- 16N.2.SL.TZ0.1f: Identify an example of competition between organisms in this food web.
- 16N.2.SL.TZ0.1e: The trout, Oncorhynchus mykiss, that live in West Brush Creek and Cement Creek also feed on...
- 16N.1.SL.TZ0.18: What restricts the length of a food chain? A. Energy losses between the trophic levelsB. A...
- 16M.1.HL.TZ0.25: The diagram represents a pyramid of energy. What level does the letter X represent? A....
- 16M.1.HL.TZ0.24: The statement is about the role of some bacteria in ecosystems. What is the mode of...
- 16M.1.SL.TZ0.18: What limits the length of food chains in an ecosystem? A. The size of individual organismsB....
- 16M.1.SL.TZ0.17: Which category of organisms is correctly described by its method of nutrition and site of...
- 15M.1.SL.TZ2.19: The following statements refer to a pyramid of energy. I. Some material is not assimilated...
- 15M.2.SL.TZ2.3a: Describe what is meant by a food chain.
- 15M.2.SL.TZ2.3b (i): Identify a food chain with four or more organisms from the forest food web.
- 17N.2.SL.TZ0.04b: Outline why the number of trophic levels is limited in a food chain.
- 15M.2.SL.TZ2.3b (ii): Deduce the trophic level of each organism identified in your food chain from (b)(i).
- 13M.2.HL.TZ2.6b: Ecologists sometimes display data from an ecosystem using a diagram called a pyramid of...
- 13M.2.SL.TZ2.7b: Ecologists sometimes display data from an ecosystem using a diagram called a pyramid of...
- 13N.1.HL.TZ0.16: The following shows an energy pyramid.How is energy lost between the trophic levels?A....
- 13M.1.SL.TZ2.19: At each trophic level energy is lost. How is this energy regained by the ecosystem? A....
- 13N.2.HL.TZ0.3b: Distinguish between the movement of energy and nutrients in an ecosystem.
- 11M.2.HL.TZ2.4c: Discuss reasons why the levels of a pyramid of energy differ in size.
- 11M.3.SL.TZ1.20b: Explain why the carnivores in an ecosystem tend to be fewer in number and have a smaller...
- 12M.1.HL.TZ2.16: The energy passing from the detritivores to the predatory invertebrates in this food web is...
- 12M.1.HL.TZ2.17: To which trophic level do the butterflies belong? A. Producers B. Primary consumers C....
- 12M.1.SL.TZ1.19: What is recycled in an ecosystem? A. Nitrogen, carbon and energy are all recycled. B....
- 12M.1.SL.TZ2.18: The energy passing from the detritivores to the predatory invertebrates in this food web is...
- 12M.2.SL.TZ1.5c: Explain the flow of energy between trophic levels in ecosystems.
- 09M.2.SL.TZ2.4b: Explain the shape of the pyramids of energy that are constructed by ecologists to represent...
- 09M.1.SL.TZ1.19: The following diagram shows part of a food web from Yellowstone Park. What would be the...
- 09M.1.SL.TZ1.21: Why do food chains in an ecosystem rarely contain more than five organisms? A. Nutrients are...
- 09M.1.HL.TZ2.21: The scarlet cup fungus (Sarcoscypha coccinea) obtains its nutrition from decaying wood by...
- 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...
- 10M.1.SL.TZ2.19: What will happen to the food web above if the sea otter disappears? A. Large fish increase...
- 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...
- 10M.2.SL.TZ2.6a: Describe the movement of energy and nutrients in an ecosystem.
- 09N.1.HL.TZ0.16: How is energy passed from one trophic level to the next? I. FoodII. LightIII. Heat A. I...
- 11N.2.SL.TZ0.3b (ii): State the initial energy source of the food chain constructed in (b)(i).
- 11N.2.SL.TZ0.3b (i): Construct a possible food chain using three of the organisms shown opposite, stating the...
- 12N.1.HL.TZ0.13: The diagram shows a pyramid of energy for a wetland environment. What units would be...
- 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.
- 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...
