Dicot Root Structure and Function

The video tutorial by Malinki covers the anatomy of a dicot root, detailing its various layers and structures. It begins with an introduction and channel promotion, followed by an explanation of the epidermis and root hairs. The cortex and parenchyma cells are discussed next, highlighting their structure and function. The endodermis is described, focusing on the suberin deposition in the form of Casparian strips. The tutorial then covers the pericycle and vascular bundles, explaining their roles in root growth and nutrient transport. The arrangement of xylem and conjunctive tissues is detailed, emphasizing the exarch pattern. Finally, the pith is described, and the session concludes with a summary of the key points.

What is the primary function of the epidermis in dicot roots?

• To absorb water and minerals

• To store nutrients

• To conduct photosynthesis

• To provide structural support

Which type of cells are predominantly found in the cortex layer of dicot roots?

• Parenchyma cells

• Epidermal cells

• Sclerenchyma cells

• Collenchyma cells

What is the special waxy material found in the endodermis called?

• Lignin

• Suberin

• Cutin

• Chitin

Where does the initiation of lateral roots occur in dicot roots?

• Endodermis

• Epidermis

• Cortex

• Pericycle

How many vascular bundles are typically found in a dicot root?

• Four to six

• One to two

• Six to eight

• Two to four

What is the arrangement called when protoxylem is located towards the periphery?

• Centrarch

• Exarch

• Endarch

• Mesarch

What is the role of conjunctive tissue in dicot roots?

• To absorb water

• To protect the root

• To connect xylem and phloem

• To store food

What is the characteristic of the pith in dicot roots?

• Highly vascularized

• Absent

• Small and inconspicuous

• Large and distinct

Which type of xylem is formed first during tissue formation?

• Metaxylem

• Protoxylem

• Secondary xylem

• Tertiary xylem

What is the central part of the dicot root called?

• Endodermis

• Pith

• Cortex

• Pericycle