[Campbell Biology P.681] Horsetails are often found in waterlogged soil. Based on the provid... | Practice Question

Horsetails are often found in waterlogged soil. Based on the provided text, what anatomical adaptation primarily allows them to thrive in such environments?

  • A: Their gritty stem texture, which prevents water absorption.
  • B: The presence of large air canals in their stems, carrying oxygen to the roots.
  • C: Their ability to produce separate fertile and vegetative stems.
  • D: Their classification as 'jointed plants,' allowing flexible stem movement.

Explanation

The text states that horsetails have 'Large air canals carry oxygen to the roots, which often grow in waterlogged soil.' This anatomical feature is crucial for survival in waterlogged conditions where oxygen availability in the soil is limited.