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Class 6 Science Chapter 2 Organism and Biodiversity
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Organism and Biodiversity
Chapter: 2
PART – I
EXERCISE
1. Darken the circle of correct answer-
(i) Butterflies help plants in:
(a) Adaptation.
(b) Preparation of food.
(c) Reproduction.
(d) Breathing.
Ans: (c) Reproduction.
(ii) Pomegranate plant is a:
(a) Tree.
(b) Shrub.
(c) Herb.
(d) Climber.
Ans: (b) Shrub.
(iii) Which of the following is not an aquatic plant?
(a) Lotus.
(b) Jasmine.
(c) Water lettuce.
(d) Water lily.
Ans: (b) Jasmine.
(iv) The wings of birds are:
(a) Modification of feather.
(b) Modification of fore limb.
(c) Modification of hind limb.
(d) Both (a) and (b).
Ans: (b) Modification of fore limb.
(v) What is the function of long fur in the body of animals living in colder regions?
(a) It protects the body from heat.
(b) It protects the body from rain.
(c) It protects the body from cold.
(d) It protects the body from injury.
Ans: (c) It protects the body from cold.
2. Fill in the blanks-
(i) Cotyledon is present within the___________.
Ans: Seed.
(ii) Net like venation is a character of ___________ plant.
Ans: Dicot.
(iii) Camels store _____________ in its hump.
Ans: Food.
(iv) The trees growing in mountain have ___________ like shape.
Ans: Cone shaped.
(v) Hollow bone is a character of ____________.
Ans: Bird.
3. Give short answers-
(i) What is called habitat?
Ans: Habitat is the natural place where an organism lives and gets food and shelter.
(ii) What is biodiversity?
Ans: Biodiversity means the variety of different types of living organisms in an environment.
(iii) How cacti are adapted to live in desert?
Ans: Cacti have spines instead of leaves to reduce water loss. Their stems are fleshy and store water.
(iv) Write three common characteristic features of living beings.
Ans: Three common characteristic features of living beings are:
Growth, reproduction, and response to stimuli.
(v) Give three examples of plants having leaves with parallel venation.
Ans: Three examples of plants having leaves with parallel venation are:
Grass, maize, and wheat.
(vi) Write significance of biodiversity.
Ans: Biodiversity maintains ecological balance, provides resources, and supports life.
(vii) “Birds are important component of biodiversity “. Justify.
Ans: Birds help control insect population, pollinate flowers, and disperse seeds, aiding forest growth.
4. Write true or false-
(i) All insects are harmful for us.
Ans: False.
(ii) Birds help in expansion of forest.
Ans: True.
(iii) There is no interrelationship among all organisms of the environment.
Ans: False.
(iv) The loss of biodiversity will affect our environment.
Ans: True.
(v) No organism can survive in extreme cold regions.
Ans: False.
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