Meristematic tissue

Question 1

What is meristematic tissue and the function.

Answer 1

Undifferentiated, unspecialized cells responsible for plant growth.

Function: Allows continuous growth and formation of new organs.

Question 2

Where is meristematic tissue found and function?

Answer 2

In growth regions:

Tips of stems & roots (apical meristem)

Axillary buds

Cambium (lateral meristem)

Function: Primary growth (elongation) and secondary growth (thickening).

Question 2

Describe the structure of meristematic cells and function?

Answer 2

Small & cubic

Densely packed (no intercellular spaces)

Large nucleus

Dense cytoplasm

No vacuoles

Function: Optimized for rapid mitosis and growth.

Question 2

How does meristematic tissue contribute to primary growth and function?

Answer 2

Apical meristems (stem/root tips) divide via mitosis, increasing length.

Function: Enables seedling emergence, root penetration, and stem elongation.

Question 3

What is the role of lateral meristems (cambium) and function?

Answer 3

Produces secondary xylem (wood) and phloem, increasing girth.

Function: Provides structural support and nutrient transport in woody plants.

Question 4

Why do meristematic cells lack vacuoles and function?

Answer 4

Vacuoles would occupy space needed for mitotic activity.

Function: Maximizes cytoplasm for cell division and growth.

Question 5

How does meristematic tissue differ from permanent tissue and function?

Answer 5

Meristematic cells:

Divide actively

Lack specialization
Permanent cells:

Differentiated

Perform specific functions

Function: Meristems sustain growth; permanent tissues execute roles (e.g., photosynthesis, support).

Question 6

Compare apical and lateral meristems and functions.

Answer 6

Apical: Primary growth (length) at tips.

Lateral: Secondary growth (thickness) via cambium.

Function: Apical = vertical growth; Lateral = structural reinforcement.