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 9
Describe how the pyramid of numbers would look in a grassland ecosystem.
Describe one limitation of the pyramid of numbers.
Describe one way in which ecological pyramids help in ecosystem management.
Describe the main difference between a pyramid of numbers and a pyramid of biomass.
A pond ecosystem has a large number of phytoplankton, fewer zooplankton, and even fewer fish. What type of ecological pyramid does this represent? (1) Upright pyramid of numbers (2) Inverted pyramid of numbers (3) Upright pyramid of biomass (4) Inverted pyramid of biomass
A grassland ecosystem has the following biomass at each trophic level: Producers – 2000 kg, Primary consumers – 400 kg, Secondary consumers – 80 kg, Tertiary consumers – 16 kg. Calculate the percentage decrease in biomass at each trophic level and explain what this indicates about energy transfer in ecosystems.
A marine ecosystem has a small biomass of phytoplankton supporting a much larger biomass of zooplankton. What does this suggest about the rate of reproduction and turnover of phytoplankton in this ecosystem?
Consider an ecosystem where the pyramid of biomass is inverted. Explain the ecological reason behind this inversion and provide an example of such an ecosystem.
A pond ecosystem has a large number of phytoplankton, fewer zooplankton, and even fewer fish. What type of ecological pyramid does this represent? (1) Upright pyramid of numbers (2) Inverted pyramid of numbers (3) Upright pyramid of biomass (4) Inverted pyramid of biomass
In a grassland ecosystem, which pyramid is most likely to be upright? (1) Pyramid of numbers (2) Pyramid of biomass (3) Pyramid of energy (4) All of the above
In an ecological pyramid, which level is most affected by biomagnification? (1) Producers (2) Primary consumers (3) Secondary consumers (4) Tertiary consumers
Which of the following best describes an ecological pyramid? (1) A graphical representation of the number of organisms at each trophic level (2) A diagram showing the flow of energy in a food web (3) A chart showing the population growth of a species (4) A map of animal migration patterns
Fill in the blank: The _______ law of thermodynamics explains why energy decreases at each trophic level in an ecological pyramid.
Fill in the blank: The amount of energy transferred from one trophic level to the next is usually about _______ percent.
Fill in the blank: The first trophic level in any ecological pyramid is occupied by _______.
Fill in the blank: The graphical representation of energy flow in an ecosystem is called the pyramid of _______.
True or False: Decomposers are always shown in ecological pyramids.
True or False: Energy is lost at each trophic level in the form of heat.
True or False: In a forest ecosystem, the pyramid of numbers is always upright.
True or False: The base of an ecological pyramid always represents producers.
