CBSE Class 6 Science Chapter 2: Diversity in the Living World — Assertion & Reason
CBSE Class 6 Science Assertion & Reason
Expert crafted · Instant PDF download · 2026-27
The following Assertion and Reason questions are based on Chapter 2: Diversity in the Living World from the NCERT Class 6 Science textbook Curiosity. Each question has four options — read both the Assertion (A) and Reason (R) carefully before selecting your answer.
How to attempt Assertion & Reason questions:
(a) Both A and R are true, and R is the correct explanation of A.
(b) Both A and R are true, but R is NOT the correct explanation of A.
(c) A is true, but R is false.
(d) A is false, but R is true.
(a) Both A and R are true, and R is the correct explanation of A.
(b) Both A and R are true, but R is NOT the correct explanation of A.
(c) A is true, but R is false.
(d) A is false, but R is true.
Assertion & Reason Questions
1
Assertion (A): Grouping plants and animals makes it easier to study them.
Reason (R): Grouping is done on the basis of similarities and differences in their features.
Reason (R): Grouping is done on the basis of similarities and differences in their features.
Answer: (a)
Both A and R are true, and R is the correct explanation of A. Grouping based on common features makes it easier to understand and study the wide variety of living organisms.
2
Assertion (A): A mango tree is classified as a shrub.
Reason (R): Shrubs are plants with hard but not very thick stems, typically branching near the ground.
Reason (R): Shrubs are plants with hard but not very thick stems, typically branching near the ground.
Answer: (d)
A is false, but R is true. A mango tree is a tall plant with a hard, thick, and woody stem, making it a tree, not a shrub. Shrubs have branching near the ground and stems that are not as thick as trees.
3
Assertion (A): Grass leaves exhibit reticulate venation.
Reason (R): Reticulate venation is a net-like pattern of veins on both sides of a thick middle vein.
Reason (R): Reticulate venation is a net-like pattern of veins on both sides of a thick middle vein.
Answer: (d)
A is false, but R is true. Grass leaves exhibit parallel venation, not reticulate. Reticulate venation is indeed a net-like pattern found in plants like hibiscus.
4
Assertion (A): The taproot system consists of a single main root with smaller side roots arising from it.
Reason (R): Hibiscus and mustard plants have taproot systems.
Reason (R): Hibiscus and mustard plants have taproot systems.
Answer: (b)
Both A and R are true, but R is NOT the correct explanation of A. While mustard and hibiscus do have taproots, this fact is just an example and does not explain the structural definition of a taproot provided in the assertion.
5
Assertion (A): A chickpea plant has reticulate venation in its leaves.
Reason (R): Chickpea seeds are dicotyledons, and dicot plants generally have reticulate venation and taproots.
Reason (R): Chickpea seeds are dicotyledons, and dicot plants generally have reticulate venation and taproots.
Answer: (a)
Both A and R are true, and R is the correct explanation of A. Chickpea is a dicot, and there is a direct relationship where dicots exhibit reticulate venation and a taproot system.
6
Assertion (A): Wheat and maize are dicotyledonous plants.
Reason (R): Monocot plants typically have fibrous roots and parallel venation in their leaves.
Reason (R): Monocot plants typically have fibrous roots and parallel venation in their leaves.
Answer: (d)
A is false, but R is true. Wheat and maize are monocotyledons, having only a single thin cotyledon, parallel venation, and fibrous roots.
7
Assertion (A): Fishes use legs to move in their aquatic habitat.
Reason (R): Different animals use different body parts like wings, legs, or fins to move from one place to another.
Reason (R): Different animals use different body parts like wings, legs, or fins to move from one place to another.
Answer: (d)
A is false, but R is true. Fishes do not use legs; they have streamlined bodies and use fins for movement in water.
8
Assertion (A): A camel can survive in a hot desert for many days without drinking water.
Reason (R): Camels excrete small amounts of urine, their dung is dry, and they do not sweat.
Reason (R): Camels excrete small amounts of urine, their dung is dry, and they do not sweat.
Answer: (a)
Both A and R are true, and R is the correct explanation of A. Because camels lose very little water from their bodies through urine, dung, or sweat, they are adapted to survive severe water scarcity in the desert.
9
Assertion (A): Deodar trees in the Himalayas are conical in shape with sloping branches.
Reason (R): The conical shape prevents the trees from photosynthesising efficiently in winters.
Reason (R): The conical shape prevents the trees from photosynthesising efficiently in winters.
Answer: (c)
A is true, but R is false. The conical shape and sloping branches of deodar trees are an adaptation that helps snow slide off easily during frequent snowfall, not to hinder photosynthesis.
10
Assertion (A): Cactus plants found in deserts have thick and fleshy stems.
Reason (R): Thick and fleshy stems help cactus plants store water to survive hot and dry conditions.
Reason (R): Thick and fleshy stems help cactus plants store water to survive hot and dry conditions.
Answer: (a)
Both A and R are true, and R is the correct explanation of A. The fleshy stems are an adaptation for storing water, enabling the cactus to tolerate the extreme heat and dry conditions of the desert.
11
Assertion (A): Camels found in the cold desert of Ladakh have two humps.
Reason (R): The two humps store water which they drink during the winter season.
Reason (R): The two humps store water which they drink during the winter season.
Answer: (c)
A is true, but R is false. Camels in cold deserts do have two humps, but these humps store food, not water, which they rely on when food is scarce during late winters.
12
Assertion (A): Frogs are considered amphibians.
Reason (R): Amphibians are animals that can live in water as well as on land.
Reason (R): Amphibians are animals that can live in water as well as on land.
Answer: (a)
Both A and R are true, and R is the correct explanation of A. Frogs are classified as amphibians precisely because they have the ability to survive in both terrestrial and aquatic habitats.
13
Assertion (A): Destruction of natural habitats leads to a loss of biodiversity.
Reason (R): Habitats provide plants and animals with food, water, air, and shelter necessary for their survival.
Reason (R): Habitats provide plants and animals with food, water, air, and shelter necessary for their survival.
Answer: (a)
Both A and R are true, and R is the correct explanation of A. When habitats are damaged, living organisms lose their homes and resources, leading directly to a decline in their populations and a loss of biodiversity.
14
Assertion (A): 'Project Tiger' was initiated in 1973 to protect the declining population of the Bengal Tiger.
Reason (R): The Cheetah Reintroduction Project was initiated to increase the number of Bengal Tigers in India.
Reason (R): The Cheetah Reintroduction Project was initiated to increase the number of Bengal Tigers in India.
Answer: (c)
A is true, but R is false. Project Tiger was indeed started in 1973. However, the Cheetah Reintroduction Project (2022) was initiated to restore the population of the Cheetah, not the Bengal Tiger.
15
Assertion (A): Sacred groves are forests protected exclusively by government forest guards.
Reason (R): Sacred groves are undisturbed patches of forests that are protected by local communities.
Reason (R): Sacred groves are undisturbed patches of forests that are protected by local communities.
Answer: (d)
A is false, but R is true. Sacred groves are community-protected treasures of biodiversity where local communities enforce strict rules against harming animals or cutting trees.
16
Assertion (A): Janaki Ammal played a key role in the 'Save Silent Valley' movement.
Reason (R): She was a zoologist who dedicated her life to saving tigers in Kerala.
Reason (R): She was a zoologist who dedicated her life to saving tigers in Kerala.
Answer: (c)
A is true, but R is false. While Janaki Ammal played a key role in saving Silent Valley, she was a botanist dedicated to documenting and preserving India's rich plant biodiversity, not a zoologist saving tigers.
17
Assertion (A): Salim Ali is referred to as the 'Birdman of India'.
Reason (R): He travelled across India to observe diversity in birds and documented their travel routes and habitats.
Reason (R): He travelled across India to observe diversity in birds and documented their travel routes and habitats.
Answer: (a)
Both A and R are true, and R is the correct explanation of A. Salim Ali earned the title 'Birdman of India' due to his extensive travel, observation, and documentation of India's bird diversity.
18
Assertion (A): Maize seeds consist of two split parts called cotyledons.
Reason (R): Plants having seeds with a single thin cotyledon are called monocotyledons.
Reason (R): Plants having seeds with a single thin cotyledon are called monocotyledons.
Answer: (d)
A is false, but R is true. Maize has only a single thin cotyledon (making it a monocot). It is seeds like chickpea that split into two parts (dicots).
19
Assertion (A): Climbers and creepers have strong, thick, and woody stems.
Reason (R): Climbers need support to grow, while creepers spread along the ground due to weak stems.
Reason (R): Climbers need support to grow, while creepers spread along the ground due to weak stems.
Answer: (d)
A is false, but R is true. Climbers and creepers have weak stems, which is why they cannot stand upright on their own and either need support to climb or must spread along the ground.
20
Assertion (A): Sea turtles live in an aquatic habitat.
Reason (R): Ponds, lakes, rivers, and oceans are examples of terrestrial habitats.
Reason (R): Ponds, lakes, rivers, and oceans are examples of terrestrial habitats.
Answer: (c)
A is true, but R is false. Sea turtles live in the ocean, which is an aquatic habitat. Ponds, lakes, rivers, and oceans are aquatic habitats, whereas terrestrial habitats include forests, deserts, and mountains.
❓ Frequently Asked Questions
What is covered in CBSE Class 6 Science Chapter 2 Diversity in the Living World?
This chapter covers all key topics from Diversity in the Living World as per CBSE 2026-27 syllabus.
Is this Assertion & Reason useful for CBSE board exams?
Yes, designed for CBSE Class 6 board exam preparation covering the complete syllabus.
Are these CBSE Class 6 Science Assertion & Reason updated for 2026-27?
Yes, all content at eBookPublisher is updated as per the latest 2026-27 CBSE syllabus.
How many chapters are in CBSE Class 6 Science?
All chapters of CBSE Class 6 Science are covered at eBookPublisher with free Assertion & Reason for each chapter.
Can I study Diversity in the Living World online for free?
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