Who proposed the polynucleotide model stating that dna and rna were composed

Wind energy is plentiful in regions with vast open spaces it is a non polluting renewable resource what could be an economic factor that makes the use of this resource less feasible then non renewable resource even in such regions

In what part of a chloroplast does glucose production occur? a. atp synthase b. photosystem ii c. photosystem d. stroma

Use the drop down menus to match each example to the fossil topic discussed then to show how the fossil record gives evidence of evolution