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Identify the meristems that cause increa...

Identify the meristems that cause increase in girth are

A

apical meristems and vascular cambium.

B

intercalary meristems and cork cambium.

C

vascular cambium and apical meristems.

D

cork cambium and vascular cambium

Text Solution

AI Generated Solution

The correct Answer is:
### Step-by-Step Solution: 1. **Understanding Meristems**: - Meristems are regions in plants where cells can divide and contribute to growth. They are classified into two main types: primary and secondary meristems. 2. **Types of Growth**: - Primary growth refers to the increase in length of the plant, which occurs at the apical (tip) and intercalary (between nodes) meristems. - Secondary growth refers to the increase in girth (circumference) of the plant, which occurs in lateral meristems. 3. **Identifying Primary Meristems**: - Apical meristems are located at the tips of roots and shoots, promoting vertical growth. - Intercalary meristems are found at the base of leaves or internodes, contributing to elongation. 4. **Identifying Secondary Meristems**: - The two main types of secondary meristems that contribute to an increase in girth are: - **Vascular Cambium**: This layer of meristematic tissue is responsible for producing new vascular tissue (xylem and phloem), contributing to the thickness of the plant. - **Cork Cambium**: This meristem produces cork cells that form the outer protective layer of the plant, also contributing to the increase in girth. 5. **Conclusion**: - The meristems that cause an increase in girth are the **vascular cambium** and **cork cambium**. ### Final Answer: The meristems that cause an increase in girth are **vascular cambium** and **cork cambium**. ---
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