Which year had the least precipitation?

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

What condition is kept close to its set point in osmoregulation? a. body temperature b.platelet count c.blood glucose level d.water balance

In the diagram below, which organelle is a ribosome, which combines amino acids and produces proteins? оооо