What two structures do plant cells have that animal cells do not have? a mitochondria and cell walls b chloroplasts and ribosomes c ribosomes and mitochondria d chloroplasts and cell walls?

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

What do nitrifying bacteria convert

Which process in respiration happens first? a)pyruvate processing b)electron transport chain c)krebs cycle d)glycolysis