"receptors for polar molecules are found while receptors for nonpolar molecules are located "

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

How does this experiment explain why it is often milder in areas such as coastal maryland while areas such as kansas or iowa have more extremes in temperature

Nucleic acid certain protein cell membranes certain carbohydrates