Ecological Services Test

Ecological Services

This is online test 02 for CBSE class 12 Biology Ecosystem (Ecological services).. There are 10 questions in this test with each question having around four answer choices.

Questions & Answers

1
The value of resource is dependent on its
  • A
    All of the these
  • B
    Requirement and types of society
    Correct
  • C
    Quantity
  • D
    Quality
2
If we remove half of the forest cover of earth the crisis that will occur
  • A
    Population, pollution and ecological imbalance will rise.
    Correct
  • B
    The remaining forest will correct the imbalance.
  • C
    Energy crisis will commence.
  • D
    Many species would become extinct.
3
Which of the following is not a ecosystem services?
  • A
    Purification of air.
  • B
    Nutrient cycling
  • C
    Production of electricity.
    Correct
  • D
    Soil formation.
4
Beside forming substrate for laboratory culture, agar is used in
  • A
    All of the these.
  • B
    Solar energy
  • C
    Photography
  • D
    Dairy and food industries, metal painting and metallurgy etc.
    Correct
5
The cost of nature’s ecosystem services is about
  • A
    Twice the global gross national product.
    Correct
  • B
    Half of the global gross national product.
  • C
    Five times the gross national product.
  • D
    Ten times the gross national product.
6
Which of the following group includes only ecosystem services?
  • A
    Soil formation, nutrient cycling, energy generation.
  • B
    Agriculture, soil formation, nutrient cycling.
  • C
    Soil formation, nutrient cycling, pollination, habitat for wild animals.
    Correct
  • D
    Soil formation, extraction of coal, pollination, recreation.
7
Out of total cost of ecosystem services, contribution of services like recreation and nutrient cycling is
  • A
    Less than 5%
  • B
    More than 5%
  • C
    More than 10%
  • D
    Less than 10%
    Correct
8
Healthy ecosystems are the base for a wide range of
  • A
    Only aesthetic goods and services.
  • B
    Only economic services.
  • C
    Economic, environmental and aesthetic goods and services.
    Correct
  • D
    Only economic services.
9
Statement I: Average price tag of US $ 33 trillion a year for fundamental ecosystem services provided by nature. Statement II: The cost of Fundamental ecosystem services is twice the global gross national prouduct. Statement III: Fundamental ecosystem services are taken as granted because they are free of cost.
  • A
    Only statement I and II is correct.
  • B
    All statements are incorrect.
  • C
    Only statement II and III is correct.
  • D
    All statements are correct.
    Correct
10
Assertion: The cost of ecosystem services includes healthy forest ecosystems purify air and water, mitigate droughts and floods, cycle nutrients, generate fertile soils and provide wildlife habitat. Reason: The cost of ecosystem services cannot be estimated accurately although they have hefty price tag.
  • A
    Both assertion and reason are correct.
    Correct
  • B
    Assertion is correct but reason is incorrect.
  • C
    Assertion is incorrect but reason is correct.
  • D
    Both assertion and reason are correct.