What are ribosomes made of and where are they located in the cell

What is the name for a substance formed in a chemical reaction

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

1. describe the structure and function of the specialized cells you observed in the video. 2. research the types of cells present in the kidney.