Question

which is not a characteristic feature of dicot stem
1. scattered vascular bundles
2. collenchymateous hypodermis
3. open collateral vascular bundles
4. endodermal cells rich in starch grains​

Answer 1

Answer:

Option 1 is the correct answer.

Explanation:

Scattered vascular bundles is not a characteristic feature of dicot stem.

In dicots, vascular bundles are arranged in a ring, with pith in the center. They are not scattered in the stem but arranged.

Answer 2

Which is not a characteristic feature of dicot stem?

---- (1) scattered vascular bundles.

Dicot stem:

• Their outerbody is covered by single-layered thick epidermis,usually coated with cuticle.
• Some epidermal hairs in the form of trichomes, are also present.
• inner to the epidermis cortex is differentiated into several layers.
• outermost layer of cortex is hypodermis which is just below the epidermis.
• In dicots, hypodermis is made up of collenchymatous cells, which provide mechanical strength to the stem.
• Innermost layer of cortex is made up of endodermis which is single cell layered of endodermal cells.
• Endodermal cells are deposited with starch referred as starch sheath.
• inner to the endodermis lies pericycle with schlerenchymatous deposition.
• Inside lies the vascular bundles which together are in ring format.
• Ring arrangement of vascular bundles are characteristic feature of dicot stem.
• Vascular bundles are conjoint, collateral and open.
• cambium is present which further initiate the secondary growth.

☆ Scattered bundles are characteristic feature of monocot stem.

$\star$ Attached is the image of transverse and longitudinal section of dicot stem.