Where are tissues in a herbaceous stem established?

The herbaceous stem is composed of vascular bundles (xylem and phloem) arranged in a circle around a central core of spongy tissue made up of parenchyma cells, called the pith. Surrounding the vascular bundles is a layer known as the cortex, which varies in thickness from species to species.

cancer   is   essentially   uncontrolled   mitosis   of specialized cells

the real answer is b. scintillation counter