Fossils up to 75,000 years old can be with

Which group of chordates does  notpossess true backbones?                 a.  birds      b.  frogs and toads      c.  lampreys      d.  crocodilians

Hybrid instruments that play sounds that are part sampled and part synthesized are known as:

Which are evidence of seafloor spreading? check all that apply. molten material magnetic stripes continent material drilled core samples ocean water samples