Living things use energy: - for activities and bodily functions, like moving and
digesting

-as the building blocks of their bodies

-all of the above

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

Imagine you are introducing the lac operan and the trp operon to students who have never learned about it before. complete the table to compare the similarities and differences between the two operons

Hemoglobin is a proton that carries oxygen around the body what is hemoglobin made from