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Free Download as PDF of the detailed solutions for class 12 Biology from NCERT or CBSE text book as per exam pattern, to help you in day to day learning. We provide all important questions and answers from chapter Evolution of Biology.
31
–1°C to 13°C annual variations in the intensity and duration of temperature and 50 to 250 cm annual variation in precipitation, account for the formation of major biome as:
[1]
Tropical forest
[2]
Coniferous forest
[3]
Temperate forest
[4]
Grassland
Answer: Coniferous forest
32
IUCN is also called as
[1]
Man and Biosphere program
[2]
World Conservation Union
[3]
World Conservation Consortium
[4]
World Wide Conservation Union
Answer: World Conservation Union
33
Which of the following pairs of an animal and a plant represents endangered organisms in India?
[1]
Banyan and Black Duck
[2]
Tamarind and Rhesus monkey
[3]
Tamarind and Rhesus monkey
[4]
Bentinckia nicobarica and red panda
Answer: Bentinckia nicobarica and red panda
34
Approximately, 50% of total world species are present on
[1]
tropical rain forest
[2]
temperate rain forest
[3]
temperate deciduous forest
[4]
coral reefs
Answer: tropical rain forest
35
Biodiversity
[1]
increases towards the equator
[2]
decreases towards the equator
[3]
remains same throughout the planet
[4]
has no effect on change in latitude
Answer: increases towards the equator
36
The most important reason for decrease in biodiversity is
[1]
habitat pollution
[2]
introduction of exotic species
[3]
over-exploitation
[4]
habitat destruction
Answer: habitat destruction
37
Which one of the following is not a renewable, exhaustible natural resource?
[1]
Aquatic animals
[2]
Aquatic animals
[3]
Soil fertility
[4]
Minerals
38
Which one of the following is an example ex-situ conservation?
[1]
National park
[2]
Wildlife sanctuary
[3]
Seed bank
[4]
Sacred groves
39
Sacred groves are specially useful in
[1]
Generating environmental awareness
[2]
Preventing soil erosion
[3]
Year-round flow of water in rivers
[4]
Conserving rare and threatened species
Answer: Conserving rare and threatened species
40
The greatest problem of water conservation is to reduce the amount of
[1]
Precipitation
[2]
Runoff water
[3]
Groundwater
[4]
Evaporation
41
Conservation within the natural habitat is
[1]
exsitu conservation
[2]
insitu conservation
[3]
invivo conservation
[4]
exvivo conservation
Answer: insitu conservation
42
Example for a renewable resource:
[1]
Soil fertility
[2]
Water
[3]
Living organisms
[4]
All of the above
43
All are insitu conservation efforts except
[1]
National parks
[2]
Sanctuaries
[3]
Zoo
[4]
biosphere reserves
44
Identify the odd combination of the habitat and the particular animal concerned
[1]
Sunderbens- Bengal Tiger
[2]
Periyar- Elephant
[3]
Rann of Kutch- Wild Ass
[4]
Dachigam National Park- Snow leopard
Answer: Dachigam National Park- Snow leopard
45
MAB program stands for
[1]
Man and biotechnology
[2]
Material and biology
[3]
Man and Biology
[4]
Man and Biosphere
Answer: Man and Biosphere
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