Anomalous Secondary Growth Practice Questions
19 free Anomalous Secondary Growth practice questions for the NCERT Biology. Tap an option to answer — you get instant feedback, the correct answer, and a detailed explanation for every question.
Anomalous secondary growth refers to:
- A Abnormal secondary growth
- B Normal increase in stem thickness
- C Primary growth only
- D Growth without cambium
Correct answer: Abnormal secondary growth
Anomalous secondary growth is a deviation from the normal pattern of secondary growth. It involves unusual cambial activity or arrangement of tissues.
Which tissue is mainly responsible for secondary growth in plants?
- A Cambium
- B Epidermis
- C Cortex
- D Pith
Correct answer: Cambium
Cambium is a lateral meristem responsible for secondary growth. It produces secondary xylem and phloem.
Which plant commonly shows anomalous secondary growth?
- A Mango
- B Sunflower
- C Bougainvillea
- D Chrysanthemum
Correct answer: Bougainvillea
Bougainvillea is a classic example of anomalous secondary growth. It shows multiple cambia formation.
In anomalous secondary growth, the cambium may:
- A Remain inactive
- B Disappear completely
- C Act irregularly
- D Form only phloem
Correct answer: Act irregularly
In anomalous growth, cambium behaves irregularly. It may produce tissues in unusual patterns.
Which of the following is a feature of anomalous secondary growth?
- A Irregular vascular bundle arrangement
- B Formation of uniform concentric rings
- C No growth in girth
- D Only primary tissues
Correct answer: Irregular vascular bundle arrangement
Anomalous growth leads to irregular arrangement of vascular tissues. This differs from normal ring-like patterns.
Which type of cambium is involved in anomalous secondary growth in some plants?
- A Apical meristem
- B Intercalary meristem
- C Successive cambium
- D Protoderm
Correct answer: Successive cambium
Successive cambia form in some plants, producing multiple rings of vascular tissue. This is a key feature of anomalous growth.
Which plant shows concentric rings of vascular bundles due to anomalous growth?
- A Chrysanthemum
- B Bougainvillea
- C Maize
- D Pea
Correct answer: Bougainvillea
Bougainvillea shows concentric rings of vascular bundles. This is due to the formation of successive cambia.
Anomalous secondary growth is commonly seen in:
- A Only in dicots
- B Only in monocots
- C Some dicots and monocots
- D Neither dicots nor monocots
Correct answer: Some dicots and monocots
Anomalous secondary growth can occur in both dicots and some monocots. It is not restricted to a single group.
Which of the following tissues is formed inwardly by cambium?
- A Phloem
- B Xylem
- C Pith
- D Epidermis
Correct answer: Xylem
Cambium produces secondary xylem towards the inside. It contributes to wood formation.
Which tissue is formed outwardly by cambium?
- A Xylem
- B Phloem
- C Pith
- D Cortex
Correct answer: Phloem
Cambium produces secondary phloem towards the outside. It helps in transport of food.
Which type of growth leads to increase in girth of plant organs?
- A Primary growth
- B Secondary growth
- C Apical growth
- D Intercalary growth
Correct answer: Secondary growth
Secondary growth increases the girth of stems and roots. It is mainly due to cambial activity.
Which plant shows anomalous growth due to included phloem?
- A Maize
- B Amaranthus
- C Sugarcane
- D Cauliflower
Correct answer: Amaranthus
Amaranthus shows included or interxylary phloem. This is a characteristic feature of anomalous secondary growth.
What is interxylary phloem?
- A Phloem outside xylem
- B Phloem inside xylem
- C Phloem in cortex
- D Phloem in pith
Correct answer: Phloem inside xylem
Interxylary phloem is phloem embedded within xylem. It arises due to anomalous cambial activity.
Which type of vascular bundle arrangement is seen in normal dicot stems?
- A Scattered
- B Random
- C Central
- D Ring-like
Correct answer: Ring-like
In normal dicot stems, vascular bundles are arranged in a ring. This allows uniform secondary growth.
Which of the following deviates from normal cambial activity?
- A Primary growth
- B Secondary growth
- C Anomalous growth
- D Apical growth
Correct answer: Anomalous growth
Anomalous secondary growth deviates from normal cambial activity. It results in unusual tissue patterns.
Which plant group often lacks typical secondary growth?
- A Dicots
- B Gymnosperms
- C Monocots
- D Pteridophytes
Correct answer: Monocots
Most monocots lack typical secondary growth. However, some show anomalous secondary growth.
Which of the following is responsible for cork formation?
- A Vascular cambium
- B Apical meristem
- C Periderm
- D Cork cambium
Correct answer: Cork cambium
Cork cambium produces cork cells. It is part of secondary growth and forms protective tissue.
Which feature is seen in stems showing anomalous growth?
- A Single cambium ring
- B No vascular tissue
- C Completely uniform structure
- D Multiple cambial rings
Correct answer: Multiple cambial rings
Anomalous growth often involves multiple cambial rings. This leads to unusual vascular patterns.
Which process leads to formation of wood in plants?
- A Secondary growth
- B Primary growth
- C Photosynthesis
- D Cellular respiration
Correct answer: Secondary growth
Secondary growth leads to formation of wood through accumulation of secondary xylem.