AP BIOLOGY

Detailed explanation-1: -Animals need shelter and insulation in the Tundra. The animals here tend to have thicker and warmer feathers and fur. Many of them have larger bodies and shorter arms, legs and tails which helps them retain their heat better and prevent heat loss.

Detailed explanation-2: -Structural adaptations are how the animal’s body functions or looks on the outside. Body parts (like feet and ears) and body coverings (like fur and scales) are structural adaptations.

Detailed explanation-3: -Animals living in polar regions have thick fur and a thick deposit of fat layer under their skin. It acts as an insulation layer and helps in protecting them from extreme cold climate.