Dicot Stem Structure and Functions

The video tutorial explains the differences between monocot and dicot plant stems, focusing on the detailed anatomy of a dicot stem using the sunflower as an example. It covers the organized tissue systems, including the epidermis, hypodermis, cortex, endodermis, and vascular bundles. The tutorial highlights the structure and function of each layer, emphasizing the unique features of dicot stems, such as the presence of resin ducts and the arrangement of xylem and phloem. The video concludes with a summary and a brief comparison with monocot stems.

What is the scientific name of the sunflower, which is used as an example of a dicot plant?

• Zea mays

• Rosa indica

• Triticum aestivum

• Helianthus annuus

What is the function of trichomes found on the epidermis of dicot stems?

• To store water

• To transport nutrients

• To protect against herbivores

• To aid in photosynthesis

Which layer in the dicot stem is known for having distinct intercellular spaces?

• Hypodermis

• Endodermis

• Epidermis

• Inner cortex

What is the innermost layer of the cortex in a dicot stem called?

• Pith

• Hypodermis

• Endodermis

• Pericycle

What is the central area of the dicot stem, encircled by vascular bundles, known as?

• Endodermis

• Pericycle

• Cortex

• Pith

How are the xylem and phloem arranged in the vascular bundles of dicot stems?

• Conjoint and collateral

• Separate and radial

• Conjoint and radial

• Separate and collateral

What type of meristem separates the xylem and phloem in dicot stems?

• Basal meristem

• Apical meristem

• Lateral meristem

• Intercalary meristem

In dicot stems, where is the protoxylem located relative to the pith?

• In the middle

• Towards the pith

• Towards the periphery

• Outside the phloem

What is the main difference between monocot and dicot stems as mentioned in the summary?

• Monocot stems have trichomes, dicot stems do not

• Dicot stems have a more organized tissue system

• Monocot stems have a pith, dicot stems do not

• Dicot stems lack vascular bundles

What is the role of the pericycle in dicot stems?

• To form lateral roots

• To support the plant

• To store nutrients

• To conduct photosynthesis