In a DNA molecule, if 38% of the molecular bases are C (cytosine), what percent of the bases are T (thymine)?
O 1) 12
2) 24
3) 38
4) 62

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

Predict the results of a two base insertion or deletion in a strand of dna that codes for a protien, how does this differ from a three base insertion or deletion?

Explain how scientists use geologic time to determine the age of landforms.