Karnataka 1st PUC Biology Chapter 13 Plant Growth and Development Important Questions

Chapter 13 of Karnataka 1st PUC Biology, Plant Growth and Development, explains how plants grow, develop, and respond to different internal and external factors. It covers plant growth characteristics, growth phases, differentiation, plant growth regulators, photoperiodism and other processes involved in plant development.

Understanding the functions of plant hormones and the stages of growth is important for answering questions from this chapter. These Karnataka 1st PUC Biology Chapter 13 Important Questions cover key concepts and provide MCQ practice to help students revise the chapter before their examinations.

Important Questions for Karnataka 1st PUC Biology Chapter 13

The official question material includes questions on plant growth, growth kinetics, differentiation, plasticity, plant growth regulators, and flowering responses. You can also refer to the Karnataka Board Class 11 Biology syllabus to review the subject coverage for the academic session.

Q1. The exponential growth can be mathematically expressed as

(A) L1 = L0 + rt

(B) W1 = W0 + ert

(C) W1 = W0 e rt

(D) L1 = L0 − rt

Q2. Fastest phase of S-shaped growth curve is

(A) Lag phase

(B) log phase

(C) stationary phase

(D) both (A) and (B)

Q3. Growth at the cellular level is principally a consequence of an increase in the amount of

(A) Protoplasm

(B) DNA

(C) cell wall

(D) cell organelles.

Q4: Read the given statements and select the correct option.

(i) One maize root cell can give rise to more than 17,500 cells.

(ii) A cell in watermelon can increase in size up to 350000 times

(iii) The growth of pollen tube is measured in terms of length

(iv) The growth of the leaf is measured in terms of surface area

(A) Statements (i) and (ii) are correct

(B) Statements (iii) and (iv) are correct

(C) Statements (I) and (iii) are correct

(D) Statements (i), (ii), (iii) and (iv) are correct 

Q5:  Increase in girth (diameter) of a plant as a result of the activities of lateral meristems is called

(A) Primary growth

(B) secondary growth

(C) Open form of growth

(D) diffuse growth.

Q6: Vascular cambium and cork cambium are

(A) Lateral meristems

(B) intercalary meristems

(C) Primary meristems

(D) secondary meristems.

Q7: Secondary growth occurs in

(A) Monocots

(B) dicots

(C) gymnosperms

(D) both (B) and (C)

Q8: Meristematic cells are characterized by

(A) Thin cellulosic cell walls

(B) dense protoplasm

(C) Prominent nuclei

(D) all of these.

Q9:  Living differentiated cells which have otherwise lost the capacity to divide can regain the power of division under certain conditions. This phenomenon is termed as

(A) Differentiation

(B) dedifferentiation

(C) Redifferentiation

(D) development

Q10: ______are the examples of tissues, formed by dedifferentiation.

(A) Interfascicular cambium

(B) Cork cambium

(C) Both (A) and (B)

(D) Tracheary elements 

Karnataka 1st PUC Biology Chapter 13 Question Bank PDF

Students preparing for the 2026–27 academic session can refer to the chapter-wise Biology question material released by the Department of School Education (Pre-University), Government of Karnataka. The Karnataka 1st PUC Biology Chapter 13 Important Questions PDF Download resource contains MCQs for classroom discussion and additional practice.

For additional exam practice, students can also refer to the Karnataka 1st PUC Biology Model Question Paper.

Benefits of Using Plant Growth and Development Important Questions

Practising chapter-wise MCQs helps students revise biological processes, understand the functions of plant hormones, and identify important concepts. The Karnataka Board 1st PUC Biology Chapter 13 Question Bank PDF provides questions that students can use for concept revision and self-assessment:

1. Helps Understand Plant Growth and Its Phases

Questions based on arithmetic growth, geometrical growth, and sigmoid growth curves help students understand how plants increase in size. They also cover growth measurements such as absolute growth rate and relative growth rate. Students can refer to the Karnataka 1st PUC syllabus while planning their chapter-wise revision.

2. Builds Clarity About Differentiation and Plasticity

Differentiation, dedifferentiation, and redifferentiation explain how plant cells develop specialised functions or regain their ability to divide. Questions on these topics help students understand the changes that take place in plant tissues. Plasticity and heterophylly are also important concepts covered in the chapter.

3. Improves Understanding of Plant Growth Regulators

Auxin, gibberellin, cytokinin, ethylene, and abscisic acid perform different functions in plant growth and development. Practising questions on their discovery, physiological roles, and effects helps students distinguish between these hormones. Referring to the Karnataka 1st PUC exam pattern 2026–27 can also help students understand the examination structure.

4. Makes Self-Assessment Easier

Students can solve the questions independently and use the answer keys to check their responses. They can also practise with Karnataka 1st PUC mid-term question papers with answer keys to review their preparation.

Regular revision of plant growth, developmental processes and plant hormones, along with MCQ practice, can help students build a clearer understanding of the chapter.

Plant Growth and Development covers several processes that explain how plants grow, mature and respond to their surroundings.

Revise growth kinetics, differentiation, plant growth regulators and flowering responses, and practise questions from the official question bank. These Karnataka 1st PUC Biology Chapter 13 Important Questions can support your chapter revision and help you identify concepts that need more practice.