Energy flow：练习题

Which statement explains why food chains usually have fewer than five trophic levels?

Why is it more energy efficient for the human population to eat crop plants directly rather than eating livestock that have been fed on crop plants?

Which statement correctly describes the flow of energy through living organisms?

Energy is lost as it moves from primary consumers to secondary consumers. Which biological process does not contribute to this energy loss?

Why is the transfer of energy from one trophic level to the next in a food chain generally considered inefficient?

State the principal source of energy input to biological systems and describe the flow of this energy through living organisms until its eventual transfer to the environment.

Explain why the transfer of energy between trophic levels is often inefficient, referring to specific metabolic processes that result in energy loss, and deduce why food chains rarely exceed five trophic levels.

Energy transfer between trophic levels is generally inefficient, with only approximately \(10\%\) of energy being passed on to the next level.
(a) Explain three reasons why the majority of energy is lost rather than transferred to the next consumer.
(b) Discuss why food chains rarely have more than five trophic levels in terms of these energy losses.