Correct answer Carries: 4.
Wrong Answer Carries: -1.
Which of the following factors is responsible for the high productivity of estuarine ecosystems?
Estuarine ecosystems are highly productive due to abundant nutrients and sufficient sunlight for photosynthesis.
Which of the following is the best example of an autotrophic organism in an aquatic ecosystem?
Phytoplankton are autotrophic organisms in aquatic ecosystems that perform photosynthesis and serve as primary producers.
Which of the following is the primary reason for the low productivity of oceans?
Despite covering 70% of the Earth's surface, oceans have low productivity due to limited nutrient availability in deeper waters.
What term describes the vertical distribution of different species in an ecosystem?
Stratification refers to the vertical arrangement of different species in an ecosystem, such as trees at the top, shrubs in the middle, and herbs at the bottom.
Which of the following statements about ecological pyramids is incorrect?
Pyramids of biomass in aquatic ecosystems can be inverted because phytoplankton have lower biomass than the organisms feeding on them.
Which of the following is a correct statement about the nitrogen cycle?
Denitrification is the microbial process that converts nitrates back into nitrogen gas, returning it to the atmosphere.
Which process in decomposition results in the accumulation of a dark-colored organic substance in soil?
Humification leads to the accumulation of humus, a dark-colored organic substance in soil that improves fertility.
Why is the pyramid of energy always upright?
The pyramid of energy is always upright because energy is lost as heat at each trophic level according to the second law of thermodynamics.
Which of the following ecosystems has the highest net primary productivity?
Tropical rainforests have the highest net primary productivity due to high temperatures, abundant rainfall, and dense vegetation.
Which of the following statements about net primary productivity (NPP) is incorrect?
NPP is always less than GPP because it accounts for the energy lost through respiration.
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