Choose the one most appropriate answer for each.
-Food chain
A)Rate at which energy becomes stored in organic compounds through photosynthesis
B)Main form of carbon storage in sea water; taken up by marine producers and converted to carbon dioxide
C)A straight-line sequence of steps by which chemical bond energy moves to higher trophic levels
D)The amount of energy from autotrophs that is available to first-level consumers
E)The movement of a nutrient among environmental reservoirs and into and out of food webs
F)Particles of organic waste products; dead, or partly decomposed tissues

Question

Quizplus · Accepted Answer

A food chain is a sequence of steps by which chemical bond energy moves to higher trophic levels, from producers to consumers.

Answer: D
 The amount of energy from autotrophs that is available to first-level consumers, also known as primary productivity, is the main source of energy in a food chain.

Answer: E
 Nutrient cycling is the movement of a nutrient among environmental reservoirs and into and out of food webs.

Answer: F
 Detritus is the term used to describe particles of organic waste products, dead, or partly decomposed tissues, that serve as a source of food for detritivores in an ecosystem.

Answers A, and B: 
 Choices A and B are not accurate definitions of a food chain. Choice A describes the process of photosynthesis, and choice B refers to dissolved inorganic carbon in ocean water.

Choose the One Most Appropriate Answer for Each