A biology teacher shows students two mammals, a sheep ( terrestrial) and a dolphin ( marine) students are ask to compare their external features and explain how each is adapted to its environment. a. Identify three external features of the sheep that are adapted for terrestrial life.

a) Here are three external features of the sheep that are adapted for terrestrial life:

1. Four strong legs with hooves:

   • Adaptation: Sheep have four well-developed limbs ending in hard hooves.
   • Explanation: These provide stability, support the body weight, and enable efficient locomotion (walking, running, climbing) on varied land surfaces, including uneven terrain. The hooves protect the feet and provide grip.

2. Thick woolly coat:

   • Adaptation: Sheep are covered in a dense, insulating layer of wool.
   • Explanation: This coat provides excellent thermal insulation, protecting the sheep from both cold temperatures in winter and excessive heat in summer, which are common fluctuations in terrestrial environments.

3. External ears (pinnae):

   • Adaptation: Sheep possess visible, movable external ear flaps.
   • Explanation: These pinnae are designed to collect sound waves from the air, allowing the sheep to detect predators, communicate with other sheep, and navigate its surroundings effectively in a terrestrial environment.