Ecological Pyramids
Biology ⇒ Ecology and Environment
Ecological Pyramids starts at 8 and continues till grade 12.
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See sample questions for grade 12
A food chain in a grassland has the following organisms: grass → grasshopper → frog → snake. Draw and label the pyramid of numbers for this food chain.
Describe how the presence of parasites can affect the shape of a pyramid of numbers.
Describe one limitation of using the pyramid of numbers to represent ecosystem structure.
Describe one situation where the pyramid of biomass may be inverted.
A food chain in a grassland has the following organisms: grass → grasshopper → frog → snake. Draw and label the pyramid of numbers for this food chain.
If a pyramid of energy shows 1000 kJ at the producer level, 100 kJ at the primary consumer level, and 10 kJ at the secondary consumer level, what is the efficiency of energy transfer between each level?
If a pyramid of numbers in a forest ecosystem is inverted, what does this indicate about the relationship between producers and consumers?
In a marine ecosystem, why might the biomass of primary consumers exceed that of producers at a given time?
In a grassland ecosystem, the pyramid of numbers is usually: (1) Upright (2) Inverted (3) Spindle-shaped (4) None of the above
In a pond ecosystem, which pyramid is most likely to be inverted? (1) Pyramid of numbers (2) Pyramid of biomass (3) Pyramid of energy (4) None of the above
Which of the following best describes an ecological pyramid? (1) A graphical representation of the number of organisms at each trophic level (2) A graphical representation of the biomass at each trophic level (3) A graphical representation of the energy at each trophic level (4) All of the above
Which of the following best explains why energy pyramids are always upright? (1) Energy is created at each trophic level (2) Energy is lost as heat at each trophic level (3) Energy is recycled completely (4) Energy increases at higher trophic levels
Fill in the blank: The 10% law was proposed by _______.
Fill in the blank: The graphical representation of the number of individuals at each trophic level is called the pyramid of _______.
Fill in the blank: The pyramid of _______ can be either upright or inverted, depending on the ecosystem.
Fill in the blank: The pyramid of _______ is never inverted.
True or False: In a forest ecosystem, the pyramid of numbers is always upright.
True or False: In most ecosystems, the pyramid of energy is always upright.
True or False: The 10% law of energy transfer states that only 10% of the energy at one trophic level is passed to the next level.
True or False: The energy content at each trophic level is measured in units such as kilojoules per square meter per year (kJ/m²/year).
