Chapter 10: Secondary Growth — Online MCQ Test
BOTANY · CLASS 11th · Tamil Nadu State Board
Practice Chapter 10: Secondary Growth with a free chapter-wise online MCQ test.
This chapter covers: Focusing on structural growth in dicots this chapter covers vascular cambium activity cork cambium formation and annual rings. Students study wood anatomy heartwood sapwood and ano....
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Chapter 10: Secondary Growth — Important Questions & Answers
The secondary growth in dicot stems is primarily brought about by the activity of?
- A. Apical meristem
- B. Vascular cambium
- C. Intercalary meristem
- D. Dermatogen
Answer: B. Vascular cambium
Secondary growth, which increases the girth of the plant, is initiated by the vascular cambium in dicot stems.
Secondary growth, which increases the girth of the plant, is initiated by the vascular cambium in dicot stems.
Which of the following is responsible for the formation of periderm?
- A. Vascular cambium
- B. Procambium
- C. Cork cambium
- D. Ground meristem
Answer: C. Cork cambium
Periderm consists of phellem (cork), phellogen (cork cambium), and phelloderm, collectively formed by the cork cambium.
Periderm consists of phellem (cork), phellogen (cork cambium), and phelloderm, collectively formed by the cork cambium.
What is the common name for Phellem?
- A. Phelloderm
- B. Cork
- C. Secondary cortex
- D. Bark
Answer: B. Cork
Phellem is technically referred to as cork, which is formed by the activity of cork cambium.
Phellem is technically referred to as cork, which is formed by the activity of cork cambium.
In a tree trunk, what happens to the primary xylem after many years of secondary growth?
- A. It gets converted into secondary xylem
- B. It remains in the center and gets crushed
- C. It is shed off with the bark
- D. It grows outwards
Answer: B. It remains in the center and gets crushed
The primary xylem is pushed towards the center and eventually gets compressed/crushed due to the massive accumulation of secondary xylem.
The primary xylem is pushed towards the center and eventually gets compressed/crushed due to the massive accumulation of secondary xylem.
What is the collective term for the tissues outside the vascular cambium?
- A. Wood
- B. Bark
- C. Stele
- D. Pith
Answer: B. Bark
Bark is a non-technical term for all tissues outside the vascular cambium, including secondary phloem, cortex, and cork.
Bark is a non-technical term for all tissues outside the vascular cambium, including secondary phloem, cortex, and cork.