Cut a transverse section of young stem of a plant from your school garden and observe it under the microscope. How would you ascertain whether it is a monocot stem or a dicot stem? Give reasons.
We would ascertain whether the given stem is a monocot stem or dicot stem by looking at some characteristics which are unique as to the particular type.
The dicots stem is characterised by the following unique characters:
i. vascular bundles are arranged in a
ii. Each vascular bundle is conjoint, collateral, and open.
iii. Medullary rays are present between the vascular bundles.
iv. Pith is present.
If these characters are observed in the given stem, then it a dicot stem
The monocot stem are characterised by the following unqiue characteristics:
1. Vascular bundles are scatttered.
2. Each vascular bundle is conjoint, collateral, and closed vascular bundles.
3. Medullary rays are absent.
State the location and function of different types of meristems.
Explain the process of secondary growth in the stems of woody angiosperms with the help of schematic diagrams. What is its significance?
Draw illustrations to bring out anatomical difference between:
(a) Monocot root and dicot root
(b) Monocot stem and dicot stem
The transverse section of a plant material shows the following anatomical features:
(a) the vascular bundles are conjoint, scattered and surrounded by a sclerenchymatous bundle sheaths.
(b) phloem parenchyma is absent. What will you identify it as?
