Join the Most Relevant JEE Main 2025 Test Series & get 99+ percentile! Join Now
Search any question & find its solution
Question: Answered & Verified by Expert
As a tree grows very old, which of the following increases more rapidly in thickness?
BiologyAnatomy of Flowering PlantsNEET
Options:
  • A Cortex
  • B Heartwood
  • C Phloem
  • D Pericycle
Solution:
1361 Upvotes Verified Answer
The correct answer is: Heartwood
As a tree matures, secondary growth results in more amount of secondary xylem as compared to secondary phloem. This secondary xylem gradually becomes non functional and forms heart wood.

Looking for more such questions to practice?

Download the MARKS App - The ultimate prep app for IIT JEE & NEET with chapter-wise PYQs, revision notes, formula sheets, custom tests & much more.