[Campbell Biology P.1184] Which statement best describes how a kangaroo's unique adaptations,... | Practice Question

Which statement best describes how a kangaroo's unique adaptations, as detailed in the text, contribute to its efficient locomotion and balance?

  • A: Their powerful forelegs store energy in tendons, which is released during jumps, and their small tail aids in rapid direction changes.
  • B: Their hind leg tendons store kinetic energy, acting like springs to reduce energy expenditure, and their large tail provides both propulsive force and stability.
  • C: They primarily rely on continuous muscle contraction for propulsion, with minimal energy recovery, and their tail is used only for communication.
  • D: Kangaroos achieve energy efficiency by gliding, not hopping, and their tail primarily acts as a counterweight against strong winds.

Explanation

The text explicitly states: 'As a kangaroo lands after each leap, tendons in its hind legs momentarily store energy. Much like the energy in a compressed spring, the energy stored in the tendons from one jump is released in the next jump, reducing the energy the animal must expend to travel.' It also notes, 'A kangaroo's large tail forms a stable tripod with its hind legs when the animal sits or moves slowly and helps balance its body during leaps. Recent studies reveal that the tail also generates significant force during hopping, helping to propel the kangaroo's forward movement.'