Question

question 2 points 2
which of the following statements about the 10% energy rule is true?
(i) most incoming energy will be dissipated into the atmosphere as heat.
(ii) energy is transferred from one trophic level to the next.
(iii) cumulative loss of energy happens with each transfer in a food chain.

statement i alone
statements i and ii
statement ii and iii
statements i, ii, and iii

Explanation:

• Statement I: In ecosystems, most energy (like from respiration, metabolic processes) is dissipated as heat, which aligns with energy flow concepts.
• Statement II: The 10% energy rule is about energy transfer between trophic levels (e.g., from producers to primary consumers), so this is true.
• Statement III: With each trophic level transfer, energy is lost (only ~10% moves to next level), leading to cumulative loss up the food chain.

All three statements are true regarding the 10% energy rule.

Answer:

Statements I, II, and III