Left on Their Own, Heterotrophs Would Deplete the World of ________

Question

Left on their own, heterotrophs would deplete the world of ________ sources and starve to death.
A) usable nitrogen
B) organic carbon
C) water
D) energy
E) oxygen

Accepted Answer

Heterotrophs rely on consuming organic matter for carbon, which they need for energy and growth. Without producers (like plants) to replenish organic carbon through photosynthesis, heterotrophs would eventually deplete the available organic carbon sources and would not be able to survive.