The most common fossils are of: vertebrates invertebrates bacteria plants

In addition to seeds, which of the following characteristics are unique to the seed-producing plants? a) sporopollenin b) lignin present in cell walls c) pollen d) use of air currents as a dispersal agent e) megaphylls

The term facultative anaerobe refers to an organism that

Which sets of mrna codons could genetically come for a protein with the following amino acid composition