In a laboratory ecosystem, a scientist introduces a small amount of radioactively labeled mater and a discrete amount of energy. He follows both as they move from trophic level to trophic level. Which best describes what he finds?
A. The energy decreases, while the labeled matter gets concentrated through the trophic levels.

B. The energy decreases, while the labeled matter gets evenly distributed through the trophic levels.

C. The energy decreases, while the labeled matter gets diluted through the trophic levels.

Question

In a laboratory ecosystem, a scientist introduces a small amount of radioactively labeled mater and a discrete amount of energy. He follows both as they move from trophic level to trophic level. Which best describes what he finds? 
A. The energy decreases, while the labeled matter gets concentrated through the trophic levels.

B. The energy decreases, while the labeled matter gets evenly distributed through the trophic levels.

C. The energy decreases, while the labeled matter gets diluted through the trophic levels.

lanre · Answer

A) The energy decreases, while the labeled mater gets concentrated through the trophic level. Energy decreases because energy is being used at each trophic level from the 1st tropic level known as the producer to the tertiary level known as the 4th trophic level. In each level, energy is used for metabolic activities and passed the remaining energy to the higher trophic level. The radioactive substance get concentrated up the trophic level through biomagnification and bioaccumulation.