You have to pull down 15 cm to lift a box 5 cm. Find MA.

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

Which of the following molecules could pass through the plasma membrane by simple diffusion? a. na+ ions b. glucose c. amino acids d. carbon dioxide

Which hormones are synthesized from cholesterol? a. steroidsb. modified amino acidsc. peptidesd. glycoproteinse. all of the above