ASMO Science Olympiad 2014 — Division P, Level 2 (Years 5 & 6) Question 16

Penguins are endotherm. Which of the following are structural adaptations that enable them to live in the cold Antarctic?

I. Presence of anti-freeze in blood.
II. Wings modified into flippers.
III. Thick layer of fat under the skin.
IV. Closely-packed overlapping feathers.