Organisms that comprise the greatest mass of living substance (biomass) in a terrestrial food chain
(a) decomposers (e. g., bacteria)
(b) producers (e. g., grasses)
(c) primary consumers (e. g., mice)
(d) secondary consumers (e. g., snakes)
(e) tertiary consumers (e. g., hawks)

How can a geological time scale best be reconstructed? a) comparing vestigial structures in living species b) comparing homologous structures in living species c) examining homologous structures in fossil remains d) examining the written records of scientists from past cultures

Plsss > .< compare and contrast the characteristics of flatworms rounds worms and earthworms

When a human or animal consumes food, the carbon in that food is most likely to be converted into which of the following elements? a. carbon remains carbon b. nitrogen c. oxygen d. hydrogen