What is the ocean feature identified in the illustration?

a.) continental shelf
b.) mid-ocean ridge
c.) seamount
d.) trench

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

Which two criteria must be met before scientist can use radiocarbon dating? explain your answer

When ash and dust begin to settle on the ground, they eventually become compacted by