Chapter Exam

Chapter 10: Secondary Growth — Online MCQ Test

Q: The secondary growth in dicot stems is primarily brought about by the activity of?

Answer: B. Vascular cambium — Secondary growth, which increases the girth of the plant, is initiated by the vascular cambium in dicot stems.

Q: Which of the following is responsible for the formation of periderm?

Answer: C. Cork cambium — Periderm consists of phellem (cork), phellogen (cork cambium), and phelloderm, collectively formed by the cork cambium.

Q: What is the common name for Phellem?

Answer: B. Cork — Phellem is technically referred to as cork, which is formed by the activity of cork cambium.

Q: In a tree trunk, what happens to the primary xylem after many years of secondary growth?

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.

Q: What is the collective term for the tissues outside the vascular cambium?

Answer: B. Bark — Bark is a non-technical term for all tissues outside the vascular cambium, including secondary phloem, cortex, and cork.

BOTANY · CLASS 11th · Tamil Nadu State Board

Practice Chapter 10: Secondary Growth with a free chapter-wise online MCQ test for Tamil Nadu State Board CLASS 11th BOTANY. 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.... AI-generated questions from basic to board-exam level, with instant results and explanations.

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Chapter 10: Secondary Growth — Important Questions & Answers (FAQ)

Frequently asked questions from Tamil Nadu State Board CLASS 11th BOTANY — Chapter 10: Secondary Growth, with answers and explanations. These are sample questions; the exam has its own separate question set.

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.

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.

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.

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.

What is the collective term for the tissues outside the vascular cambium?