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“The energy flow in the ecosystem follows the second law of th
Biology Exemplar
Biology Exemplar

Class 12

NCERT Exemplar

Publisher:
NCERT
Subject:
Biology
1

Chapter 1: Reproduction in Organisms

48 questions

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2

Chapter 2: Sexual Reproduction in Flowering Plants

52 questions

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3

Chapter 3: Human Reproduction

48 questions

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4

Chapter 4: Reproductive Health

37 questions

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5

Chapter 5: Principles of Inheritance and Variation

52 questions

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6

Chapter 6: Molecular Basis of Inheritance

71 questions

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7

Chapter 7: Evolution

52 questions

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8

Chapter 8: Human Health and Disease

70 questions

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9

Chapter 9: Strategies for Enhancement in Food Production

77 questions

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10

Chapter 10: Microbes in Human Welfare

59 questions

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11

Chapter 11: Biotechnology: Principles and Processes

48 questions

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12

Chapter 12: Biotechnology and its Applications

52 questions

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13

Chapter 13: Organisms and Populations

70 questions

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14

Chapter 14: Ecosystem

68 questions

Q1
Given below is a list of autotrophs and heterotrophs. With your knowledge about food chain, establish various linkages between the organisms on the principle of ‘eating and being eaten’. What is this inter-linkage established known as?
Algae, hydrilla, grasshopper, rat, squirrel, crow, maize plant, deer, rabbit, lizard, wolf, snake, peacock, phytoplankton, crustaceans, whale, tiger, lion, sparrow, duck, crane, cockroach, spider, toad, fish, leopard, elephant, goat, Nymphaea, Spirogyra.
Q2
“The energy flow in the ecosystem follows the second law of thermodynamics.” Explain.
Q3
What will happen to an ecosystem if
(a)   All producers are removed
(b)   All organisms of herbivore level are eliminated and
(c)   All top carnivore population is removed
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15

Chapter 15: Biodiversity and Conservation

61 questions

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16

Chapter 16: Environmental Issues

52 questions

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Question
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“The energy flow in the ecosystem follows the second law of thermodynamics.” Explain.

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Biology Exemplar (NCERT Exemplar)

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According to second law of thermodynamics every activity involving energy transformation (According to first law - energy can be transferred and transformed) is accompanied by dissipation of energy as heat and only a part of it is used in building up tissues in an organisms.
This trapped energy as biomass is transferred to next trophic level. According to Lindman's law only 10% of the stored energy is passed from one trophic level to successive trophic level.
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Practice more questions from Biology Exemplar (NCERT Exemplar)

Q1
Given below is a list of autotrophs and heterotrophs. With your knowledge about food chain, establish various linkages between the organisms on the principle of ‘eating and being eaten’. What is this inter-linkage established known as?
Algae, hydrilla, grasshopper, rat, squirrel, crow, maize plant, deer, rabbit, lizard, wolf, snake, peacock, phytoplankton, crustaceans, whale, tiger, lion, sparrow, duck, crane, cockroach, spider, toad, fish, leopard, elephant, goat, Nymphaea, Spirogyra.
Q2
“The energy flow in the ecosystem follows the second law of thermodynamics.” Explain.
Q3
What will happen to an ecosystem if
(a)   All producers are removed
(b)   All organisms of herbivore level are eliminated and
(c)   All top carnivore population is removed
View all

Practice questions from Biology Exemplar (NCERT Exemplar)

Question 1
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What does the base tier of the ecological pyramid represent?
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Question 2
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Decomposers like fungi and bacteria are
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(iv) chemo-autotrophs
Choose the correct answer
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  2. (i) and (iv)
  3. (ii) and (iii)
  4. (i) and (ii)
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Biology Exemplar (NCERT Exemplar)

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Question 3
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What will happen to an ecosystem if
(a)   All producers are removed
(b)   All organisms of herbivore level are eliminated and
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Question 4
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What are the three types of ecological pyramids. What information is conveyed by each pyramid with regard to structure, function and energy in the ecosystem.
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Increase in concentration of the toxicant at successive trophic levels is known as :
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Question Text
“The energy flow in the ecosystem follows the second law of thermodynamics.” Explain.
TopicEcosystem
SubjectBiology
ClassClass 12
Answer TypeText solution:1
Upvotes96