Concepts, Pattern And Importance Of Biodiversity Test

Concepts, Pattern And Importance Of Biodiversity

This is online test 02 for CBSE class 12 Biology Biodiversity and Conservation (Concepts, pattern and importance of biodiversity).. There are 10 questions in this test with each question having around four answer choices.

Questions & Answers

1
Which of the following can solely keep an ecosystem self-sustaining and viable:
  • A
    producer-decomposer food chain
    Correct
  • B
    producer-consumer food chain
  • C
    consumer-decomposer food chain
  • D
    producer- predator food chain
2
Following plants belonging to same genus (Solanum) represent:
Question 2 figure 1
  • A
    species diversity
    Correct
  • B
    community diversity
  • C
    genetic diversity
  • D
    gamma diversity
3
Alpha diversity will describe:
  • A
    inter community diversity
  • B
    intra community diversity
    Correct
  • C
    diversity within a species population
  • D
    diversity within biomes
4
Which of the benefits, wetlands provide:
  • A
    They provide social, economic and environmental beneficiaries.
  • B
    Being rich in nutrients, they provide a diverse and productive ecosystem.
  • C
    all options are correct.
    Correct
  • D
    They prevent flood and recharge groundwater.
5
Out of the following which one will not represent an alternative way to categories ecosystem diversity:
  • A
    community diversity
  • B
    population diversity
    Correct
  • C
    habitat diversity
  • D
    landscape diversity
6
keystone species include :
  • A
    only tiger
  • B
    only American bullfrogs
  • C
    Tiger,Ssalmon and Sea Otters
    Correct
  • D
    Sea otters and American bullfrogs
7
Polyps and medusae of coelenterates (fixed and free-floating stages) are examples of polymorphism related to:
  • A
    genetic diversity
    Correct
  • B
    species diversity
  • C
    ecosystem diversity
  • D
    habitat diversity
8
If snakes become extinct : i). The loss will make the bionetwork imbalanced ii). Their gene pool will be lost forever iii). Result will be loss of biodiversity
  • A
    only statement i) & iii) are correct.
  • B
    only statement iii) is correct
  • C
    only statement ii) & iii) are correct.
  • D
    all statements are correct.
    Correct
9
Rare species are : i. represented by small populations in the world. ii. thinly distributed over a wide area. iii. all are grouped as endangered or vulnerable at present.
  • A
    only ii & iii are correct.
  • B
    only i & ii are correct.
    Correct
  • C
    all are correct
  • D
    only i & iii are correct.
10
Assertion: The pattern of species diversity on earth is not uniformly distributed. Reason: Species variation is generally highest in the tropics and decreases towards the poles.
  • A
    Both assertion and reason are correct.
    Correct
  • B
    Assertion is correct but reason is incorrect.
  • C
    Both assertion and reason are incorrect.
  • D
    Assertion is incorrect but reason is correct.