Multiple Choice
Which stage of cellular respiration requires the oxygen that you breathe?
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8. Respiration
Introduction to Cellular Respiration
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In ecological pyramids, how does energy flow through an ecosystem?
A
Energy remains constant across all trophic levels, with no loss or gain.
B
Energy flows from consumers to producers, increasing at each trophic level.
C
Energy is recycled completely within the ecosystem, with no loss at any level.
D
Energy flows from producers to consumers and is lost as heat at each trophic level.
Verified step by step guidance1
Understand the concept of an ecological pyramid: It represents the flow of energy through different trophic levels in an ecosystem, starting from producers at the base to top-level consumers.
Recognize that energy flow in an ecosystem is unidirectional, meaning it moves in one direction from producers to consumers.
Identify the role of producers: Producers, such as plants, capture energy from the sun through photosynthesis and convert it into chemical energy stored in organic compounds.
Acknowledge the transfer of energy: As energy moves from producers to primary consumers (herbivores) and then to secondary and tertiary consumers (carnivores and omnivores), a significant portion of energy is lost as heat due to metabolic processes.
Understand the concept of energy loss: At each trophic level, only a small fraction of energy (approximately 10%) is transferred to the next level, while the rest is dissipated as heat, leading to a decrease in available energy at higher trophic levels.
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