Chapter Exam

Chapter 3: Vegetative Morphology — Online MCQ Test

Q: The primary function of the root system is absorption of water and minerals. In which plant does the root system originate from the radicle?

Answer: A. Tap root system — A tap root system develops directly from the radicle of the embryo, which is typical of dicotyledonous plants.

Q: Which of the following plants exhibits a fibrous root system?

Answer: C. Paddy — Fibrous root systems consist of a cluster of roots originating from the base of the stem and are common in monocots like paddy.

Q: Pneumatophores are specialized roots found in plants growing in:

Answer: B. Swampy, saline areas — Pneumatophores (respiratory roots) emerge vertically upwards in mangrove plants growing in swampy or saline soils to obtain oxygen.

Q: Compare the venation patterns: In monocots, the venation is usually parallel, whereas in dicots, it is usually:

Answer: A. Reticulate — Dicot leaves typically exhibit reticulate venation, where veins form a complex web-like network.

Q: In a pinnately compound leaf, where are the leaflets present?

Answer: B. On both sides of the rachis — In pinnately compound leaves, leaflets are arranged laterally along the midrib, which is called the rachis.

BOTANY · CLASS 11th · Tamil Nadu State Board

Practice Chapter 3: Vegetative Morphology with a free chapter-wise online MCQ test for Tamil Nadu State Board CLASS 11th BOTANY. This chapter covers: This chapter details plant habit stem modifications root systems and leaf structure variations. Students explore phyllotaxy venation leaf modifications and vegetative adaptation st.... AI-generated questions from basic to board-exam level, with instant results and explanations.

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Chapter 3: Vegetative Morphology — Important Questions & Answers (FAQ)

Frequently asked questions from Tamil Nadu State Board CLASS 11th BOTANY — Chapter 3: Vegetative Morphology, with answers and explanations. These are sample questions; the exam has its own separate question set.

The primary function of the root system is absorption of water and minerals. In which plant does the root system originate from the radicle?

A. Tap root system ✓
B. Fibrous root system
C. Adventitious root system
D. Stilt root system

Answer: A. Tap root system
A tap root system develops directly from the radicle of the embryo, which is typical of dicotyledonous plants.

Which of the following plants exhibits a fibrous root system?

A. Mustard
B. Mango
C. Paddy ✓
D. Banyan

Answer: C. Paddy
Fibrous root systems consist of a cluster of roots originating from the base of the stem and are common in monocots like paddy.

Pneumatophores are specialized roots found in plants growing in:

A. Desert regions
B. Swampy, saline areas ✓
C. Rocky hill slopes
D. Tropical rainforests

Answer: B. Swampy, saline areas
Pneumatophores (respiratory roots) emerge vertically upwards in mangrove plants growing in swampy or saline soils to obtain oxygen.

Compare the venation patterns: In monocots, the venation is usually parallel, whereas in dicots, it is usually:

A. Reticulate ✓
B. Convergent
C. Divergent
D. Pinnate

Answer: A. Reticulate
Dicot leaves typically exhibit reticulate venation, where veins form a complex web-like network.

In a pinnately compound leaf, where are the leaflets present?

A. At the tip of the petiole
B. On both sides of the rachis ✓
C. At the base of the stem
D. Randomly on the stem

Answer: B. On both sides of the rachis
In pinnately compound leaves, leaflets are arranged laterally along the midrib, which is called the rachis.

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Chapter 4: Reproductive Morphology