Which of the following is not a pyrimidine?
guanine
cytosine
thymine
none of the above

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

What would happen to the nutrients in an ecosystem if decomposers, such as bacteria, didn’t exist there?

Drag each label to the correct location on the table. each label can be used more than once. decide whether each statement describes saturated fat, unsaturated fat, or both saturated and unsaturated fats.