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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.
76
Which of the following is false?
[1]
Rate of succession is faster in secondary succession.
[2]
Quantity of biomass in a trophic level at a particular period is called as standing crop.
[3]
The energy content in a trophic level is determined by considering a few individuals of a species in that trophic level
[4]
The succession that occurs in newly cooled lava is called primary succession
Answer: The energy content in a trophic level is determined by considering a few individuals of a species in that trophic level
77
Succulent plants grow in
[1]
Tundra
[2]
Deserts
[3]
Tropical rain forests
[4]
Temperate deciduous forests
78
Which one of the following statements for pyramid of energy is incorrect, whereas the remaining three are correct?
[1]
It is upright in shape
[2]
Its base is broad
[3]
It shows energy content of different trophic level organisms
[4]
It is inverted in shape
Answer: It is inverted in shape
79
Which one of the following ecosystem types has the highest annual net primary productivity?
[1]
Tropical deciduous forest
[2]
Tropical rain forest
[3]
Temperate deciduous forest
[4]
Temperate evergreen forest
Answer: Tropical rain forest
80
Synecology deals with
[1]
Ecology of many species
[2]
Ecology of many populations
[3]
Ecology of community
[4]
None of the above
Answer: Ecology of community
81
Which one of the following animals may occupy more than one trophic levels in the same ecosystem at the same time?
[1]
Goat
[2]
Frog
[3]
Sparrow
[4]
Lion
82
Organisms which break down detritus into matter particles
[1]
Herbivores
[2]
Carnivores
[3]
Detritivores
[4]
None of these
83
The nature’s cleaners are
[1]
Producers
[2]
Consumers
[3]
Decomposers and scavengers
[4]
Symbionts
Answer: Decomposers and scavengers
84
A renewable exhaustible natural resource is
[1]
Petroleum
[2]
Coal
[3]
Forest
[4]
Minerals
85
Ecotype is a type of species in which environmentally induced variations are
[1]
Temporary
[2]
Genetically fixed
[3]
Genetically not related
[4]
None of the above
Answer: Genetically fixed
86
Stratification is more common in
[1]
Deciduous forest
[2]
Tropical rain forest
[3]
Temperate forest
[4]
Tropical savannah
Answer: Tropical rain forest
87
DDT residues are rapidly passed through food chain causing biomagnification because DDT is
[1]
Water soluble
[2]
Lipo soluble
[3]
Moderately toxic
[4]
Non-toxic to aquatic animals
88
Average total rainfall is 100 - 150 cm in ______, located in Australia, South America and Africa.
[1]
Tropical Savannas
[2]
Chaparrals
[3]
Deciduous forest
[4]
Temperate forest
89
Pyramid of energy in ecosystems is
[1]
Always upright
[2]
Always inverted
[3]
Mostly upright
[4]
Mostly inverted
90
The most recently discovered ecosystem is
[1]
Vents
[2]
Crater
[3]
Tundra
[4]
Floating iceberg
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