Plant Anatomy Plant Tissues MCQs for NEET — Botany Questions with Answers

The description for dicot roots states: 'Next to endodermis lies a few layers of thick-walled parenchyomatous cells referred to as pericycle. Initiation of lateral roots and vascular cambium during the secondary growth takes place in these cells.' The context indicates that monocot root anatomy is 'similar to the dicot root in many respects,' implying the pericycle's role in lateral root initiation applies to monocots too, though secondary growth does not occur.

The context defines stele as: 'All tissues on the innerside of the endodermis such as pericycle, vascular bundles and pith constitute the stele.'

The text states: 'As compared to the dicot root which have fewer xylem bundles, there are usually more than six (polyarch) xylem bundles in the monocot root. Pith is large and well developed' in monocots, contrasting with dicots where 'The pith is small or inconspicuous.'

The text explicitly states: 'The parenchymatous cells which lie between the xylem and the phloem are called conjuctive tissue.' This is a feature common to both dicot and monocot roots described in the general root anatomy section.

The context states: 'When xylem and phloem within a vascular bundle are arranged in an alternate manner along the different radii, the arrangement is called radial such as in roots.'

The text describes the cortex as consisting 'of several layers of thin-walled parenchyma cells with intercellular spaces.' This is common to both dicot and monocot roots.

The text states: 'The outermost layer is epiblema. Many of the cells of epiblema protrude in the form of unicellular root hairs.' Root hairs are responsible for absorption.

Active transport uses ATP to move solutes against the gradient.

Endarch in stems (protoxylem inside), exarch in roots (protoxylem outside).

Lower cambial activity in winter produces narrower, fewer xylem vessels.