Which existed during the Precambrian era? Protists
Birds
Plants
Mammals
Reptiles
Eukaryotes
Prokaryotes

protists

plants

eukaryotes

prokaryotes

Explanation:

besides a few groups that survive until the present, there were little multi-cellular life forms during the precambrian era

answer; coat color for blending in with dry grass;

answer;

a. sheep consumption efficiency would be reduced.

explanation;

-trophic efficiency is a measure of how much energy occurs at one level divided by the energy at the level immediately below it . trophic efficiency incorporates three types of efficiency:

-the proportion of available energy that is consumed (consumption efficiency).   it is the proportion of the available biomass that is ingested by consumers.

-the proportion of ingested food that is assimilated (assimilation efficiency).

-the proportion of assimilated food that goes into new consumer biomass (production efficiency).

-in this case, the grasshoppers would affect sheep by reducing the proportion of the available biomass that is ingested by the sheep.