On average what portion of the energy in an ecosystem is transferred from one tropic level to the next ? where does the rest of the energy go

How are proteins and nucleic acids related? they both provide energy. they both carry genetic information. the structure of proteins is determined by nucleic acids. the subunits of nucleic acids are also the subunits of proteins.

Idon’t know the answer and i’ve been stuck on it for a while now skskskskks

How much time has elapsed from the very beginning of "the memior of the conquistador bernal diaz del castillo" to the end? a. castillo's whole life b. a quarter of an hour c. a few weeks d. a decade