Identify producers and consumer levels while recognizing that a varied diet can place an organism at several levels.
Tę umiejętność sprawdza 14 zadań wzorowanych na arkuszach IB z lat 2023–2025.
A model aquatic chain has the following tissue concentrations of a persistent insecticide. Microalgae → herbivorous zooplankton → small fish → fish-eating birds 0.03 ppm →0.36 ppm →2.4 ppm →19.2 ppm (i) Identify the trophic role of the small fish. (ii) Explain…
Consider connections between biological processes at different levels of organization. (a) Outline three properties of energy-storage polysaccharides that make them effective reserves. (b) Describe the transfer of energy along a food chain. (c) Explain why…
Arrows in this food web point from food to consumer. How many animal species feed exclusively as primary consumers in the web shown? A. 5 B. 4 C. 6 D. 3
Which pair can each occupy the tertiary-consumer level in at least one chain shown? A. Geese and mussels B. Ducks and eagles C. Zooplankton and small fish D. Algae and large fish
Which organism acts as both a secondary and a tertiary consumer in different chains? A. C B. D C. A D. B
Which role does the snail occupy in the chain? A. Herbivore feeding on a producer B. Predator feeding on the duck C. Photosynthetic primary producer D. Decomposer feeding only on dead animals
A simplified model represents a coastal food web. Identify two primary consumers in the web.
Identify the trophic level of C.
In a hypothetical woodland, a seed-eating rodent stores tree seeds underground. Some stored seeds are never recovered. (i) Describe how both the rodent and tree can benefit. (ii) Identify the rodent’s trophic level when eating these seeds.
(i) State, with a reason, whether this animal is autotrophic or heterotrophic. (ii) Explain what information is needed to determine its trophic level.
(i) Identify the trophic level occupied by the lizard. (ii) Identify the type of interspecific relationship between the owl and the lizard.
Outline one limitation of an energy pyramid representing this food web.
A constructed marine survey compares hydrophobic PCB pollutants in organisms. Error bars represent variability among samples. (i) Suggest why mussels have a mean trophic level between 2 and 3. (ii) Predict one possible consequence if orcas disappear from this…
State the trophic level occupied by limpets.
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