1. This fossil snake and this living rat both have a structure in their skull called the quadrate bone.
What best explains why both species have a quadrate bone?

Where do homologous chromosomes exchange genetic material through crossing over?               a.  chlorophyll    b.  centrosomes    c.  centromeres    d.  chiasma

Awater molecule is polar because there is an uneven distribution of these between the oxygen and hydrogen atoms.

For each of the following, decide whether the statement describes photosynthesis, cellular respiration, or both. releases energy in the form of atp. stores energy in glucose molecules. performed by producers. performed by consumers.