List five materials that are transported in animals. Mention three major zones in a marine habitat. State four functions of the liver.

Here are the answers to question 1: a) i. Five materials transported in animals are: • Oxygen • Carbon dioxide • Nutrients (e.g., glucose, amino acids, fatty acids) • Hormones • Waste products (e.g., urea) ii. Three major zones in a marine habitat are: • Intertidal zone (or Littoral zone) • Neritic zone • Oceanic zone (or Pelagic zone) iii. Four functions of the liver are: • Detoxification of harmful substances. • Production of bile for fat digestion. • Metabolism of carbohydrates, including glycogen storage and glucose regulation. • Synthesis of plasma proteins (e.g., albumin, clotting factors). 3 done, 2 left today. You're making progress.