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Biology Exemplar
Class 12
NCERT Exemplar
1
Chapter 1: Reproduction in Organisms
48 questions
2
Chapter 2: Sexual Reproduction in Flowering Plants
52 questions
3
Chapter 3: Human Reproduction
48 questions
4
Chapter 4: Reproductive Health
37 questions
5
Chapter 5: Principles of Inheritance and Variation
52 questions
6
Chapter 6: Molecular Basis of Inheritance
71 questions
7
Chapter 7: Evolution
52 questions
8
Chapter 8: Human Health and Disease
70 questions
9
Chapter 9: Strategies for Enhancement in Food Production
77 questions
10
Chapter 10: Microbes in Human Welfare
59 questions
11
Chapter 11: Biotechnology: Principles and Processes
48 questions
12
Chapter 12: Biotechnology and its Applications
52 questions
13
Chapter 13: Organisms and Populations
70 questions
14
Chapter 14: Ecosystem
68 questions
Q1
What is an ecosystem service? List any four important ecosystem services provided by the natural ecosystems. Are you in favour or against levying a charge on the service provided by the ecosystem?
Q2
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.
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.
Q3
“The energy flow in the ecosystem follows the second law of thermodynamics.” Explain.
View all question15
Chapter 15: Biodiversity and Conservation
61 questions
16
Chapter 16: Environmental Issues
52 questions
Question
Easy
Solving time: 2 mins
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.
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Food Chain and Food Web: A straight line sequence of ‘who eats whom’ or eating and being eaten in an ecosystem is called a food chain. A network of cross connecting food chains involving producers, consumers and decomposers are termed as a food web.
Lion, Tiger — Top carnivore (Top tropic level)
Spider, cockroach, lizard, wolf, snake, toad, fish, crane — Secondary Consumer (IIIrd trophic level).
Crustaceans, grasshopper, deer, mouse, squirrel, rabbit, elephant, goat — Primary Consumer (IInd trophic level).
Phytoplankton, algae, Hydrilla, maize plant, Nymphaea, Spirogyra — Producers (Ist trophic level).
Lion, Tiger — Top carnivore (Top tropic level)
Spider, cockroach, lizard, wolf, snake, toad, fish, crane — Secondary Consumer (IIIrd trophic level).
Crustaceans, grasshopper, deer, mouse, squirrel, rabbit, elephant, goat — Primary Consumer (IInd trophic level).
Phytoplankton, algae, Hydrilla, maize plant, Nymphaea, Spirogyra — Producers (Ist trophic level).
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Practice more questions from Biology Exemplar (NCERT Exemplar)
Q1
What is an ecosystem service? List any four important ecosystem services provided by the natural ecosystems. Are you in favour or against levying a charge on the service provided by the ecosystem?
Q2
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.
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.
Q3
“The energy flow in the ecosystem follows the second law of thermodynamics.” Explain.
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| Question Text | 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. |
| Topic | Ecosystem |
| Subject | Biology |
| Class | Class 12 |
| Answer Type | Text solution:1 |
| Upvotes | 59 |
