CBSE Class 6 Science Exemplar: Getting to Know Plants - NCERT Solutions
This resource provides comprehensive NCERT Solutions for CBSE Class 6 Science Exemplar, Chapter 7: Getting to Know Plants. It covers essential concepts related to various plant parts, including roots, stems, leaves, and flowers. The solutions explain the functions of these parts, such as water conduction by stems, photosynthesis in leaves, and the reproductive role of flowers. Detailed explanations are provided for multiple-choice questions, clarifying topics like venation, root types, stem characteristics, leaf structures, the process of photosynthesis, and the parts of a flower. These solutions are designed to help students understand the fundamental aspects of plant biology and prepare effectively for their examinations by reinforcing key concepts and problem-solving approaches.
Quick info
| Board | CBSE |
|---|---|
| Class | Class 6 |
| Subject | Science Exemplar |
| Session | 2026 |
| Language | English |
| Type | NCERT Solutions |
| Chapter | Chapter 7 |
Chapter summary
Chapter 7, 'Getting to Know Plants,' focuses on the diverse structures and functions of plants. This NCERT Solutions set clarifies concepts such as parallel and reticulate venation, fibrous and tap roots, and the different types of stems (herbs, shrubs, trees). It also delves into the primary functions of stems, the components of a leaf and their roles, the essential requirements and outcomes of photosynthesis, and the reproductive parts of a flower. The solutions offer clear explanations for MCQs, aiding students in grasping plant anatomy and physiology.
Learning outcomes
- Identify and differentiate between parallel and reticulate venation.
- Distinguish between fibrous and tap root systems.
- Classify plants based on stem characteristics (herb, shrub, tree).
- Understand the primary functions of plant stems.
- Recognize the parts of a leaf and their functions.
- Explain the process of photosynthesis and its requirements.
- Identify the female reproductive parts of a flower.
Topics covered
Paper topics
- Plant Parts
- Roots (Fibrous and Tap)
- Stems (Herbs, Shrubs, Trees)
- Leaf Venation (Parallel and Reticulate)
- Functions of Stems
- Leaf Structure and Function
- Photosynthesis
- Flower Parts (Female Reproductive Organs)
Important topics
- Understanding Plant Structures
- Functions of Roots and Stems
- Leaf Venation and Photosynthesis
- Parts of a Flower
PDF preview
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Questions and Solutions
Question 1
- Parallel venation and fibrous root
- Parallel venation and tap root
- Reticulate venation and fibrous root
- Reticulate venation and tap root
(a): Parallel venation and fibrous root
Grass leaves typically display parallel venation, where the veins run in parallel lines from the base to the tip of the leaf. They also possess a fibrous root system, which consists of numerous thin, thread-like roots that arise from the base of the stem, rather than a single, thick main root.
Question 2
- Weak stem which cannot stand upright: Creeper
- Green tender stem: Shrub
- Thick, hard stem with branching near the base: Tree
- Thick, hard stem with branches high on the plant: Herb
(a): Weak stem which cannot stand upright: Creeper
Plants are categorized based on their stem characteristics. Herbs are small plants with green, tender stems that cannot stand upright. Shrubs are medium-sized plants with woody, hard stems that branch out near the base. Trees are tall plants with thick, hard stems and branches that grow high above the ground. A creeper is a plant with a weak stem that trails along the ground.
Question 3
- Conduction of water
- Photosynthesis
- Formation of branches
- Bears flowers and fruits
(b): Photosynthesis
The primary function of leaves is photosynthesis, where they use sunlight, water, and carbon dioxide to produce food. The main functions of a stem include providing support to the plant, holding it upright, forming branches, transporting water and minerals from the roots to the leaves, and bearing flowers and fruits.
Question 4
- Petiole: attaches leaf to stem
- Lamina: green flat part of leaf
- Margin: gives shape to the leaf
- Veins: transpiration
(d): Veins: transpiration
The petiole is the stalk that attaches the leaf blade to the stem. The lamina is the broad, flat, green part of the leaf where photosynthesis occurs. The margin is the edge of the leaf, which contributes to its overall shape. Veins within the leaf are responsible for transporting water, minerals, and food, and also provide structural support. Transpiration, the process of water evaporation from the plant, primarily occurs through tiny pores called stomata on the leaf surface, not directly through the veins.
Question 5
(i) Sunlight, carbon dioxide, chlorophyll and water are necessary.
(ii) Oxygen is absorbed.
(iii) Leaves carry out photosynthesis.
(iv) Proteins are made during photosynthesis.
Choose the correct pair of sentences that are true to photosynthesis.- (iii) and (iv)
- (i) and (iii)
- (ii) and (iv)
- (i) and (iv)
(b): (i) and (iii)
Photosynthesis is the process by which green plants use sunlight, carbon dioxide, and water to create their own food (glucose). Chlorophyll, the green pigment in leaves, is essential for capturing light energy. Therefore, sunlight, carbon dioxide, chlorophyll, and water are necessary (i). Leaves are the primary sites for photosynthesis (iii). During photosynthesis, oxygen is released, not absorbed (ii), and carbohydrates (like glucose) are produced, not proteins (iv).
Question 6
- Sepals, petal and stamen
- Stigma, style and ovary
- Ovary, stamen and stigma
- Ovary, style and stamen
(b): Stigma, style and ovary
The female reproductive part of a flower is called the pistil or carpel. It is typically composed of three parts: the stigma, which is the receptive tip that catches pollen; the style, a stalk connecting the stigma to the ovary; and the ovary, located at the base, which contains the ovules. Sepals and petals are accessory floral parts, while stamens are the male reproductive organs.
Common mistakes
- Confusing parallel venation with reticulate venation.
- Misidentifying the type of root system.
- Incorrectly associating functions with plant parts (e.g., transpiration with veins).
- Confusing the inputs and outputs of photosynthesis.
Revision tips
- Draw diagrams of different plant parts (leaves, roots, flowers) and label them.
- Create flashcards for key terms like venation, photosynthesis, and flower parts.
- Practice identifying plant types (herb, shrub, tree) in your surroundings.
- Review the conditions necessary for photosynthesis and its products.
- Explain the functions of stems and leaves in your own words.
Practice MCQs
Q1. Which type of venation and root system is typically observed in grass?
Explanation: Grass leaves exhibit parallel venation, where the veins run parallel to each other. They also possess a fibrous root system, characterized by thin, thread-like roots arising from the base of the stem.
Q2. A plant with a weak stem that cannot stand upright is typically classified as:
Explanation: Plants with weak stems that trail along the ground are known as creepers. Herbs have green and tender stems but are generally upright, while shrubs and trees have woody, upright stems.
Q3. Which of the following is NOT considered a primary function of a plant stem?
Explanation: Photosynthesis is primarily carried out by the leaves, which contain chlorophyll. The main functions of the stem include supporting the plant, transporting water and nutrients, and bearing reproductive structures.
Q4. The statement 'Veins: transpiration' is an incorrect match because:
Explanation: While veins transport water, the actual evaporation of water during transpiration occurs through small pores called stomata, mainly located on the leaf surface. Veins are involved in transport and support.
Q5. Which two sentences accurately describe photosynthesis?
Explanation: Photosynthesis requires sunlight, carbon dioxide, chlorophyll, and water as inputs. This vital process is primarily carried out by the leaves. Oxygen is released, and carbohydrates (like glucose) are produced, not proteins.
Q6. The female reproductive part of a flower consists of which three components?
Explanation: The pistil or carpel, which is the female reproductive part of a flower, is composed of the stigma (receptive tip), style (stalk), and ovary (base containing ovules).
Frequently asked questions
What are the key differences between parallel and reticulate venation?
Parallel venation is characterized by veins running parallel to each other within the leaf blade, commonly seen in grasses. Reticulate venation features veins forming a network or web-like pattern, typical of dicotyledonous plants like mango leaves.
Can you explain the different types of plant stems mentioned in the solutions?
Yes, stems are categorized based on their characteristics. Herbs have green, tender, and usually upright stems. Shrubs have thicker, woody stems with branches near the base. Trees are tall with thick, hard stems and branches high up.
What are the essential requirements for photosynthesis?
Photosynthesis requires sunlight as the energy source, carbon dioxide from the air, water absorbed by the roots, and chlorophyll present in the leaves to capture light energy.
Which parts of the flower constitute the female reproductive system?
The female reproductive part of a flower, known as the pistil or carpel, consists of three main parts: the stigma, the style, and the ovary.
How do these NCERT Solutions help students prepare for exams?
These solutions provide clear, step-by-step explanations for each question, reinforcing understanding of plant biology concepts. They clarify common misconceptions and highlight important functions and structures, aiding in effective revision and exam preparation.
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