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Assertion (A) : Biodiversity means diversity at species level.
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Assertion (A) : Biodiversity means diversity at species level.
Reason (R): Biodiversity is a diversity not only al species level but at all levels of biological organization.
(A)  Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).
(B) Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).
(C) Assertion (A) is true but reason (R) is false.
(D) Assertion (A) is false but reason (R) is true.

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Oswaal CBSE MCQs Chapterwise For Term I II, Class 12, Biology (Oswaal)

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Assertion (A) : Biodiversity means diversity at species level.
Reason (R): Biodiversity is a diversity not only al species level but at all levels of biological organization.
(A)  Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).
(B) Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).
(C) Assertion (A) is true but reason (R) is false.
(D) Assertion (A) is false but reason (R) is true.
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Option (D) is correct.
The term biodiversity is popularized by Edward Wilson, it is a diversity at all levels of biological organization from macromolecules within cells to the biomes.
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Practice questions from Oswaal CBSE MCQs Chapterwise For Term I II, Class 12, Biology (Oswaal)

Question 1
Easy
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Views: 5,937

Identify a cause of biodiversity loss that is not included in evil quartet?
(A) Co-extinction
(B) Pollution
(C) Alien species invasion
(D) Habitat loss and fragmentation
Topic

Topic:

Biodiversity and Conservation

Book

Book:

Oswaal CBSE MCQs Chapterwise For Term I II, Class 12, Biology (Oswaal)

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Question 2
Easy
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Views: 5,481

Which of the following is not a cause for loss of biodiversity?
(A) Destruction of habitat
(B) Invasion by alien species
(C) Keeping animals in zoological parks
(D) Over-exploitation of natural resources
Topic

Topic:

Biodiversity and Conservation

Book

Book:

Oswaal CBSE MCQs Chapterwise For Term I II, Class 12, Biology (Oswaal)

View solution

Question 3
Medium
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Views: 5,195

What is common to the techniques (i) in-vitro fertilisation, (ii) Cryopreservation and (iii) tissue culture?
(A) All are in-situ conservation methods.
(B) All are ex-situ conservation methods.
(C) All require ultra-modern equipment and large space.
(D) All are methods of conservation of extinct organisms.
Topic

Topic:

Biodiversity and Conservation

Book

Book:

Oswaal CBSE MCQs Chapterwise For Term I II, Class 12, Biology (Oswaal)

View solution

Question 4
Easy
Views

Views: 5,364

Which of the following countries has the highest biodiversity?
(A) Brazil
(B) South Africa
(C) Russia
(D) India
Topic

Topic:

Biodiversity and Conservation

Book

Book:

Oswaal CBSE MCQs Chapterwise For Term I II, Class 12, Biology (Oswaal)

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Practice more questions from Biodiversity and Conservation

Question 1
Easy
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Views: 5,707

Assertion (A) : Percentage of animals is more than the percentage of plants.
Reason (R) : 70% of all the species are animals, while plants contribute nearly 22% of the total.
(A)  Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).
(B) Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).
(C) Assertion (A) is true but reason (R) is false.
(D) Assertion (A) is false but reason (R) is true.
Topic

Topic:

Biodiversity and Conservation

Book

Book:

Oswaal CBSE MCQs Chapterwise For Term I II, Class 12, Biology (Oswaal)

View solution

Question 2
Medium
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Views: 5,524

The number of species facing the threat of extinction worldwide is
  1. 14,500
  2. 14,000
  3. 15,000
  4. 15,500
Topic

Topic:

Biodiversity and Conservation

View solution

Question 3
Hard
Views

Views: 5,797

Manas sanctuary is located at
  1. Rajasthan
  2. Assam
  3. Bihar
  4. Gujarat
Topic

Topic:

Biodiversity and Conservation

View 2 solutions

Question 4
Medium
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Views: 5,150

Assertion: Broadly utilitarian arguments say that we should conserve biodiversity because biodiversity plays a major role in many ecosystem services that nature provides.
Reason: Exploration of molecular, genetic and species level diversity to obtain the products of economic importance is included under broadly utilitarian category.
  1. If both Assertion and Reason are true and Reason is the correct explanation of Assertion
  2. If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
  3. If Assertion is true but Reason is false.
  4. If both Assertion and Reason are false.
Topic

Topic:

Biodiversity and Conservation

Book

Book:

NEET Question Bank i Biology for AIIMS (Disha)

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Practice questions on similar concepts asked by Filo students

Question 1
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Defien symmetry and describe various types of symmetry found in animals.
Topic

Topic:

Diversity in the Living World

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Question 2
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Texts: 1. Define: - Acute radiation syndrome - Atrophy - Desquamation - Erythema - Alopecia/Epilation - Inflammation 2. In order for the total body radiation syndrome to be applicable, radiation exposure must happen under the following condition? 3. Structural changes to the chromosome that occur after irradiation are termed? 4. Following radiation exposure to the bone marrow, what are the first cells to be reduced? 5. What are the 4 response stages for acute radiation syndrome? What happens in each stage? 6. For the acute radiation syndrome, in the 100-1,000 R range, death is mostly the result of damage to the cardiovascular system. 7. For the acute radiation syndrome, in the 600-10,000 R range, death is mostly the result of damage to the gastrointestinal system. 8. For the acute radiation syndrome, at doses greater than 10,000 R, death is mostly the result of damage to the central nervous system. 9. Death from a single dose of whole body irradiation primarily involves damage to the gastrointestinal system. 10. What are acute local tissue effects of radiation exposure? 11. The formation of cataracts caused by radiation is termed radiation-induced cataracts. 12. What is LD50/30, LD 50/60, and SED50? 13. Depletion of mature sperm in the male due to irradiation is termed spermatogenesis. 14. Regarding the bone marrow cells, what is the correct order from least sensitive to most sensitive? 15. Radiation-induced chromosomal damage that occurs before DNA synthesis is known as pre-DNA synthesis damage. 16. What is used as a chromosome map used for cytogenetic analysis of chromosomes? 17. What is the principal response of the blood caused by radiation exposure? 18. The reproductive cells of the male are termed sperm cells. 19. The reproductive cells of the female are termed ova or eggs. 20. Which acute radiation syndrome has an average survival time that is independent of dose? 21. The main effect on the female gonads is damage to the ova or eggs. 22. The main effect on the male gonads is damage to and reduction in the number of sperm cells. 23. Radiation-induced cataracts have an average latent period of approximately 10-15 years. 24. Doses as low as 0.1 Gy have caused observable responses to human gonads.
Topic

Topic:

Biology

View solution

Question 3
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Views: 5,369

Texts: Individuals with the heterozygous genotype (Ss) for Sickle-cell exhibit resistance to Malaria, a serious disease spread by mosquitoes in Africa and other tropical regions. How might this affect the frequency of the recessive allele in the African population? Choose the best answer. The frequency of the recessive allele will probably decrease because homozygous dominant individuals are more susceptible to Malaria and may die before reproducing. This might increase the frequency of the recessive allele because heterozygous individuals have higher fitness in the African environment. The frequency of the recessive allele will stay the same because there is no natural selection occurring. The frequency of the recessive allele will probably increase because resistance to Malaria will increase the value of p in our calculations.
Topic

Topic:

Biology

View solution

Question 4
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Views: 5,083

Gold has a specific heat of 0.129 J/(g·°C). How many joules of heat energy are required to raise the temperature of 15 grams of gold from 22 °C to 85 °C?
Topic

Topic:

Biology

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Question Text
Assertion (A) : Biodiversity means diversity at species level.
Reason (R): Biodiversity is a diversity not only al species level but at all levels of biological organization.
(A)  Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).
(B) Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).
(C) Assertion (A) is true but reason (R) is false.
(D) Assertion (A) is false but reason (R) is true.
TopicBiodiversity and Conservation
SubjectBiology
ClassClass 12
Answer TypeText solution:1
Upvotes50