[Campbell Biology P.680] Which of the following is a defining characteristic of microphylls,... | Practice Question

Which of the following is a defining characteristic of microphylls, as described in the text?

  • A: They are typically larger than megaphylls and support greater photosynthetic productivity.
  • B: They possess a highly branched vascular system.
  • C: They are small, often spine-shaped leaves supported by a single strand of vascular tissue.
  • D: They emerged in the fossil record later than megaphylls, around 370 million years ago.

Explanation

As stated in the text, microphylls are 'small, often spine-shaped leaves supported by a single strand of vascular tissue.' This distinguishes them from megaphylls which have a highly branched vascular system and are typically larger.