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ISC (Science) ISC Class 12 - CISCE Question Bank Solutions

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What is symbiosis?

[1] Reproduction in Organisms
Chapter: [1] Reproduction in Organisms
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Explain the term perianth.

[1] Reproduction in Organisms
Chapter: [1] Reproduction in Organisms
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Give two differences between heartwood and sapwood.

[1] Reproduction in Organisms
Chapter: [1] Reproduction in Organisms
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What is Red Data Book?

[15] Biodiversity and Its Conservation
Chapter: [15] Biodiversity and Its Conservation
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Give one significant contribution of the given scientist

E. Wilson

[15] Biodiversity and Its Conservation
Chapter: [15] Biodiversity and Its Conservation
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Define Hotspots.

[15] Biodiversity and Its Conservation
Chapter: [15] Biodiversity and Its Conservation
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Define Ramsar Sites.

[15] Biodiversity and Its Conservation
Chapter: [15] Biodiversity and Its Conservation
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Define Biodiversity.

[15] Biodiversity and Its Conservation
Chapter: [15] Biodiversity and Its Conservation
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Define Eutrophication.

[15] Biodiversity and Its Conservation
Chapter: [15] Biodiversity and Its Conservation
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Explain the rivet Popper hypothesis.

[15] Biodiversity and Its Conservation
Chapter: [15] Biodiversity and Its Conservation
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Define amniocentesis.

[3] Reproductive Health
Chapter: [3] Reproductive Health
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Give the biological name of the following: 

The microbe used to produce Swiss cheese.

[10] Microbes in Human Welfare
Chapter: [10] Microbes in Human Welfare
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Give the biological name of the following:

A symbiotic nitrogen-fixing bacterium found in root nodules.

[10] Microbes in Human Welfare
Chapter: [10] Microbes in Human Welfare
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Differentiate between the following:

Spermatogenesis and oogenesis

[3] Reproductive Health
Chapter: [3] Reproductive Health
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A homozygous pea plant with round seed coat and yellow cotyledons are crossed with another homozygous, pea plant having wrinkled seed coat and green cotyledons.

  1. Give the types of gametes produced by plants of F-generation.
  2. Give the dihybrid phenotypic ratio with the corresponding phenotypes.
  3. State Mendel’s principle involved in this cross.
[4] Principles of Inheritance and Variation
Chapter: [4] Principles of Inheritance and Variation
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Expand the following abbreviation:

IUCD

[3] Reproductive Health
Chapter: [3] Reproductive Health
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Give the role of amniocentesis.

[3] Reproductive Health
Chapter: [3] Reproductive Health
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Mention one cause for variation in nature.

[4] Principles of Inheritance and Variation
Chapter: [4] Principles of Inheritance and Variation
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Explain the chemiosmotic hypothesis for ATP synthesis.

[15] Biodiversity and Its Conservation
Chapter: [15] Biodiversity and Its Conservation
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List the advantages of biogas plants in rural areas.

[10] Microbes in Human Welfare
Chapter: [10] Microbes in Human Welfare
Concept: undefined >> undefined
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