What is part of the endomembrane system?

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

19. scientists use meteorites that hit earth to provide evidence of the composition of earth's interior because they hypothesize that

Chloroplasts and bacteria are in size. a. similar b. at different ends of the size range c. exactly the same d. none of these