Correct answer Carries: 4.
Wrong Answer Carries: -1.
Which of the following is a secondary consumer in a forest ecosystem?
A frog is a secondary consumer in a forest ecosystem, as it preys on insects that consume plants.
Which of the following statements about food webs is correct?
Food webs represent multiple interconnected food chains, showing the complex feeding relationships in an ecosystem.
Which of the following statements about the water cycle is correct?
Evaporation causes water to rise into the atmosphere, eventually leading to precipitation and completing the water cycle.
Which of the following best represents a simple food chain in a grassland ecosystem?
A typical food chain in a grassland ecosystem begins with producers (grass) and moves up through primary, secondary, and tertiary consumers.
Which of the following statements about energy transfer in an ecosystem is incorrect?
Energy is not completely recycled in an ecosystem; it flows in one direction and is lost as heat.
Which of the following is a characteristic of a detritus food chain?
The detritus food chain starts with dead organic matter and is broken down by decomposers before energy is transferred to consumers.
Which of the following is the most important abiotic factor influencing primary productivity?
Solar radiation is the primary abiotic factor influencing primary productivity, as it drives photosynthesis in producers.
What is the function of humus in the soil?
Humus increases microbial activity, resists rapid decomposition, and acts as a nutrient reservoir, playing a crucial role in soil fertility.
Which of the following best explains why energy transfer between trophic levels is inefficient?
Energy transfer is inefficient because most energy is lost as heat during respiration at each trophic level.
Why does the energy pyramid remain upright in all ecosystems?
The energy pyramid is always upright because energy is lost as heat at each trophic level, making energy flow unidirectional.
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