9. All are analogous structure except:
a. wings of flies and birds
b. streamlined shapes of seals and penguins c. pelvic bone of whales and sharks
d. limb skeleton of humans and birds

10. Which is NOT a vestigial structure
a. hind wings of flies and mosquito
b. pectoral bone of whales
c. wings of flight less birds
d. leaves of xenophytes​