[Campbell Biology P.779] Which of the following is a significant adaptation of tetrapods for... | Practice Question

Which of the following is a significant adaptation of tetrapods for life on land, as described in the text?

  • A: Retention of gills in adult forms.
  • B: Pectoral fins for propulsion.
  • C: Limbs with digits for supporting weight.
  • D: Absence of a distinct neck structure.

Explanation

The text explicitly states: 'In place of pectoral and pelvic fins, tetrapods have limbs with digits. Limbs support a tetrapod's weight on land, while feet with digits efficiently transmit muscle-generated forces to the ground when it walks.' This highlights limbs with digits as a key adaptation for weight support and locomotion on land. Other options are either incorrect or represent a lack of adaptation mentioned in the text.