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).