Histogens are components of -a)Apical meristemb)Intercalary meristemc)Lateral meristemd)Secondary meristemCorrect answer is option 'A'. Can you explain this answer?

Question

Answer

Histogens are theory that mostly applicable for Apical meristem.

Answer

According to Histogen theory, Apical meristem consists of histogens( dermatogen, periblem, pleurome)

Answer

Apical meristem

Answer

Hisogen are components of Apical meristem.

Answer

Apical meristem:
Apical meristem is a type of primary meristem found at the tips of plant shoots and roots. It is responsible for the growth in length of the plant and gives rise to the primary tissues of the plant body. The apical meristem consists of undifferentiated, actively dividing cells that produce new cells for the plant to grow.

Histogens:
Histogens are specialized cells found in the apical meristem that give rise to the different types of tissues in the plant body. They are responsible for the formation of the three primary meristems - protoderm, ground meristem, and procambium.

Components of apical meristem:
1. Protoderm: The protoderm is derived from the outermost layer of histogenic cells in the apical meristem. It gives rise to the epidermis, which is the outermost protective layer of the plant.

2. Ground meristem: The ground meristem is derived from the middle layer of histogenic cells in the apical meristem. It gives rise to the ground tissues of the plant, including the cortex, pith, and mesophyll.

3. Procambium: The procambium is derived from the innermost layer of histogenic cells in the apical meristem. It gives rise to the vascular tissues of the plant, including the xylem and phloem.

Role of histogens:
Histogens play a crucial role in the development and differentiation of plant tissues. They undergo cell division and produce new cells, which then differentiate into specific cell types and form different tissues. The protoderm gives rise to the epidermal tissues, which provide a protective covering for the plant. The ground meristem gives rise to the ground tissues, which provide support and storage for the plant. The procambium gives rise to the vascular tissues, which transport water, nutrients, and sugars throughout the plant.

Conclusion:
In conclusion, histogens are components of the apical meristem and are responsible for the formation of the three primary meristems - protoderm, ground meristem, and procambium. These primary meristems give rise to the different types of tissues in the plant body, including the epidermis, ground tissues, and vascular tissues.

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