Correct answer Carries: 4.
Wrong Answer Carries: -1.
Which of the following organisms are NOT considered primary producers?
Zooplankton are consumers that feed on phytoplankton, which are primary producers.
Which of the following is a major difference between a grazing food chain and a detritus food chain?
Grazing food chains begin with living plants, while detritus food chains start with dead organic matter that decomposers break down.
Which of the following statements about decomposers is correct?
Decomposers break down dead organic matter and recycle essential nutrients back into the ecosystem.
Which of the following best explains why an energy pyramid is always upright?
The energy pyramid is always upright because energy is lost as heat at each trophic level, making energy transfer inefficient.
Which of the following statements about food chains is incorrect?
Food chains do not exist independently; they interconnect with other food chains to form a food web.
Which of the following statements about ecological pyramids is incorrect?
The pyramid of numbers can be inverted, as seen in forest ecosystems where a single tree supports many consumers.
Food chains do not always begin with decomposers; they usually start with producers like plants.
Which of the following correctly describes the movement of energy in an ecosystem?
Energy flow in an ecosystem is unidirectional, moving from producers to consumers and eventually lost as heat.
Which type of ecological pyramid can be inverted in a pond ecosystem?
In an aquatic ecosystem, the pyramid of biomass is often inverted because the biomass of phytoplankton (producers) is lower than that of consumers.
Which of the following is the primary factor affecting the rate of decomposition?
The availability of oxygen significantly affects decomposition, as it is required for microbial activity.
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