Why concentric vascular bundles are always closed?

Concentric vascular bundles are always closed. Describe.

Answer the following: Hadrocentric and leptocentric vascular bundles are always closed. Give reason.

Which type of vascular bundles are observed in isobilateral leaf?

The cross-section of a plant material showed the following features when viewed under the microscope. the vascular bundles were radially arranged. Four xylem strands with exarch conditions of protoxylem. To which organ should it be assigned?

The transverse section of a plant shows following anatomical features :(i) Large number of scattered vascular bundles surrounded by bundle sheath. (ii) Large conspicuous parenchymatous ground tissue. (iii)Vascular bundles conjoint and closed.

Why vascular bundles of dicot stem are described as conjoint, collateral and open?

A student was observing a slide with no label under microscope. The section had some vascular bundles scattered in the ground tissue. It is section of a monocot stem! He exclaimed. No! It is section of fern rachis, said the teacher. Teacher told to observe vascular bundle again. Student agreed. Why?

The transverse section of a plant material shows the following anatomical features, (a) the vascular bundles are conjoint, scattered and surrounded by sclerenchymatous bundle sheaths (b) phloem parenchyma is absent. What will you identify it as?

In conjoint vascular bundle xylem & phloem are present in same radius, phloem present towards outer side cambium is present between them is called as