What is true of all organisms in the kingdoms Protista, Plantae, Fungi, and Animalia

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

Most of the carbon on earth is stored in the form of

In the respiration-photosynthesis cycle shown above, what are the products of cellular respiration that belong in box 2?