Chapter 3: Vegetative Morphology — Online MCQ Test
BOTANY · CLASS 11th · Tamil Nadu State Board
Practice Chapter 3: Vegetative Morphology with a free chapter-wise online MCQ test.
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....
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Chapter 3: Vegetative Morphology — Important Questions & Answers
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.
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.
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.
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.
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.
In pinnately compound leaves, leaflets are arranged laterally along the midrib, which is called the rachis.