NEET · Biology · Anatomy of Flowering Plants doubts
10 doubts found
How can you tell a tree's age (and past climate) from the rings in its trunk?
A dicot tree thickens each year as the vascular cambium adds a new layer of wood.
Why does removing a complete ring of bark around a tree trunk ('girdling') eventually kill it?
The phloem lies in the bark.
How does a plant grow taller and also thicker — is it the same tissue doing both?
No, two different meristems do the two jobs.
Why is wood so strong and useful for building, even though it comes from a living tree?
Wood is mostly xylem.
What does “Xylem and phloem” actually mean in Anatomy of Flowering Plants, and why does it matter for NEET?
xylem carries water and minerals upward (its conducting cells are dead), while phloem carries food both ways (its cells are living).
I keep getting “Xylem and phloem” questions wrong in Anatomy of Flowering Plants. What's the trap?
thinking both tissues move water.
What does “Meristems” actually mean in Anatomy of Flowering Plants, and why does it matter for NEET?
regions of actively dividing cells — apical meristems make a plant taller, lateral meristem (cambium) makes it thicker.
I keep getting “Meristems” questions wrong in Anatomy of Flowering Plants. What's the trap?
thinking growth happens all over the plant equally.
What is the difference between monocot stem and dicot stem?
A monocot stem has scattered vascular bundles and no cambium (no secondary growth); a dicot stem has bundles in a ring with cambium, allowing it to thicken over years.
What is the difference between heartwood and sapwood?
Heartwood is the dark, dead central wood that only supports the tree; sapwood is the lighter outer wood that still conducts water.