Que- What was the source of hydrogen for first photosynthetic organisms?
a. Water
b. Hydrogen present in soil
c. Hydrogen sulphate
d. Hydrogen sulphide
Answer- Hydrogen sulphide
Que- Flagella might have arisen through the ingestion of
a. Cyano-bacteria
b. Spirochetes
c. Chlamydomonas
d. Paramecium
Answer- Spirochetes
Que- Important point/s of Lamarck's theory
a. Use and disuse of organs
b. Inheritance of acquired characters
c. Natural selection
d. Both A and B
Answer- Both A and B
Que- Who developed a theory of natural selection essentially identical to Darwin's
a. Hardy-Weinberg
b. Alfred Wallace
c. Malthus
d. Lyell
Answer- Alfred Wallace
Que- Neo-Darwinism has integrated discoveries and ideas from
a. Taxonomy
b. Paleontology
c. Genetics
d. All of these
Answer- All of these
Que- The actual remains or traces of organisms that lived in ancident geological times
a. Vestigial remains
b. Fossils
c. Fuel
d. None of these
Answer- Fossils
Que- Most fossils are found in the
a. Metamorphic rocks
b. Soil
c. Sedimentary rocks
d. Volcanic mountains
Answer- Sedimentary rocks
Que- Which statement is incorrect?
a. Homologous organs are functionally different but structurally alike
b. Analogous organs are functionally different but structurally alike
c. Examples of homologous structures are arms of man, forelimb of cat, flipper of whale
d. Examples of analogous structures are wings of bats, birds and insects
Answer- Analogous organs are functionally different but structurally alike
Que- Analogous organs show
a. Convergent evolution
b. Divergent evolution
c. Straight evolution
d. Zig-zag evolution
Answer- Convergent evolution
Que- In humans gill pouches have modified into
a. Nose
b. Ear
c. Eustachian tubes
d. External ear
Answer- Eustachian tubes
Que- A group of interbreeding individuals belonging to a particular species and sharing a common geopraphic area is called
a. Community
b. Family
c. Population
d. Race
Answer- Population
Que- Natural selection can amplify or diminish variations that are
a. Non heritable
b. Heritable
c. Both heritable and non heritable
d. Acquired
Answer- Heritable
Que- Adaptations that an organism acquires by its own actions are
a. Heritable
b. Not heritable
c. Can be made heritable through some modifications
d. Both heritable and not heritable
Answer- Not heritable
Que- A group of populations that have the potential to interbreed in nature is
a. Genus
b. Family
c. Species
d. Community
Answer- Species
Que- The total aggregate of genes in a population at any one time is called population's
a. Genome
b. Genomic library
c. Genetic group
d. Gene pool
Answer- Gene pool
Que- If all members of a population are homozygous for the same allele, that allele is said to be
a. Fixed in gene pool
b. Mobile in gene pool
c. Random in gene pool
d. Stationary in gene pool
Answer- Fixed in gene pool
Que- According to Hardy-Weinberg theorem, frequencies of alleles and genotypes in a population's gene pool remain
a. Mobile
b. Stationary
c. Constant
d. Constant unless acted upon by agents other than sexual recombination
Answer- Constant unless acted upon by agents other than sexual recombination
Que- The ultimate source of all changes is
a. Mutation
b. Migration
c. Genetic drift
d. Selection
Answer- Mutation
Que- Disturbance in the gene pool is created by
a. Emigration
b. Immigration
c. Both a and b
d. Panmigration
Answer- Both a and b
Que- Change in the frequency of alleles at a locus that occurs by chance is
a. Multation
b. Selection
c. Non-random mating
d. Genetic drift
Answer- Genetic drift
Que- Which of the following organs serve no apparent purpose
a. Vestigial organs
b. Non vestigial organs
c. Homologous organs
d. Analogous organs
Answer- Vestigial organs
Que- Which of the following precesses had resulted in the production of different breeds of domestic dogs and pigeons?
a. Natural selection
b. Cross breeding
c. Artificial selection
d. Self breeding
Answer- Artificial selection
Que- Which of the following is not vestigial organ of man?
a. Appendix
b. Coccyx
c. Nictitating membrane
d. None of these
Answer- None of these
Que- Concept of evolution was first presented by
a. Aristotle
b. Lamarck
c. Darwin
d. Wallace
Answer- Aristotle
Que- If we consider Hardy-Weinberg law, then following is incorrect in its sense
a. Mutations cause changes in genetic frequency
b. Migration changes allelic frequency
c. There should not be selection
d. Non-random mating will reduce chances of evolution
Answer- Non-random mating will reduce chances of evolution
Que- Study of relationship of organisms to their environment is
a. Ecology
b. Palaentology
c. Geology
d. None of these
Answer- Ecology
Que- All populations within an ecosystem interconnected to one another are known as
a. Species
b. Family
c. Community
d. Biomes
Answer- Community
Que- Major regional ecological community of plants and animals forms
a. Biosphere
b. Biomass
c. Biomes
d. Bioecosystem
Answer- Biomes
Que- The actual location or place where an organism lives is
a. Environment
b. Biosphere
c. Biomass
d. Habitat
Answer- Habitat
Que- The role a species plays in a community including behavior and influence is
a. Nichon
b. Niche
c. Autecology
d. Profession
Answer- Niche
Que- Study of a single population's relationship to its environment is called
a. Ecology
b. Synecology
c. Autecology
d. Niche
Answer- Autecology
Que- The biosphere covers about
a. 8-10 km
b. 5-10 km
c. 15-30 km
d. 16-20 km
Answer- 16-20 km
Que- Abiotic components include
a. Atmosphere
b. Hydrosphere
c. Lithosphere
d. All of these
Answer- All of these
Que- Which statement is true?
a. Producers are heterotrophic organisms
b. Consumers are autotrophic organisms
c. Fungi and bacteria are decomposers
d. Consumers release chemical elements as ions
Answer- Fungi and bacteria are decomposers
Que- Sequence of changes in community and its non-living environment over a period of time is
a. Niche
b. Succession
c. Alterations
d. Neo-ecology
Answer- Succession
Que- Plants growing in xeric conditions are called
a. Spherophytes
b. Mesophytes
c. Xerophytes
d. Teridophytes
Answer- Xerophytes
Que- Lichen and algae form
a. Climax community
b. Pioneers community
c. Initiator community
d. Seral community
Answer- Pioneers community
Que- Diverse and stable community at the end of succession is
a. Climax community
b. Pioneers community
c. Top community
d. Stable community
Answer- Climax community
Que- Secondary succession starts from
a. A bar rock sand
b. Clear glacial pool
c. From remains of previous ecosystem
d. Fire
Answer- From remains of previous ecosystem
Que- Hydrosere is
a. Secondary succession starting in a pond
b. Primary succession starting in a pond
c. Primary succession starting on a dry soil
d. All of these
Answer- Primary succession starting in a pond
Que- Mosses are
a. Dermatocarpon
b. Permellia
c. Tortula
d. Both b and c
Answer- Tortula
Que- Wood forests form the
a. Pioneers community
b. Climax community
c. Top community
d. Transient community
Answer- Climax community
Que- Disease in living organisms caused by parasites is called
a. Parasitism
b. Infestation
c. Predation
d. Infection
Answer- Infestation
Que- Legume plants are the hosts to
a. Rhizobium
b. Mycorrhiza
c. Lichen
d. Algae
Answer- Rhizobium
Que- A dual organism composed of symbiotic association of an alga living within a fungus myceliium is
a. Mycorrhiza
b. Rhizobium
c. Lichen
d. Legume
Answer- Lichen
Que- Symbiosis relationship in which only one organism is benefited is
a. Symbiosis
b. Commensalism
c. Mutualism
d. Unism
Answer- Commensalism
Que- Sharks may have small fish attached to them called
a. Rumors
b. Romas
c. Romosis
d. Remoras
Answer- Remoras
Que- Over grazing leads to
a. Good pastured lands
b. Rocky areas
c. Totally barren lands
d. Salinity
Answer- Totally barren lands
Que- Nitrogen constitutes about ______ % of atmosphere
a. 0.58
b. 0.25
c. 0.1
d. 0.78
Answer- 0.78
Que- Oxidation of ammonia or ammonium ions by bacteria in soil is called
a. Nitrification
b. Ammonification
c. Assimilation
d. Denitrification
Answer- Nitrification
Que- Gross primary production is
a. Amount of energy fixed by small plants
b. Amount of energy fixed by large plants
c. Total amount of energy fixed by all plants
d. Primary production minus respiratory loss
Answer- Total amount of energy fixed by all plants
Que- Plant biomass is
a. Gross primary production
b. Net primary production
c. Gross primary production minus respiratory loss
d. Both b and c
Answer- Both b and c
Que- Total solar energy trapped by the producers in an ecosystem is
a. 0.95
b. 0.2
c. 0.78
d. 0.01
Answer- 0.01
Que- The major unit of ecology is
a. Population
b. Community
c. Ecosystem
d. Biome
Answer- Ecosystem
Que- Eco' part of word ecosystem means
a. Family household
b. Study of
c. Collection of related parts that function as a unit
d. Environment
Answer- Environment
Que- Which of the following is not true for food web?
a. Formed from food chain
b. Complex than food chain
c. Stable than food chain
d. Starts with primary consumers
Answer- Starts with primary consumers
Que- Which one of the following is more tolerant to herbivore
a. Grasses
b. Trees
c. Herbs
d. None of these
Answer- Grasses
Que- Which of the following step of nitrogen cycle is not useful for plants
a. Ammonification
b. Nitrification
c. Denitrification
d. Both a and c
Answer- Denitrification
Que- Weather refers to
a. Short-term fluctuations in temperature, cloud cover, wind and precipitation
b. It prevails over periods of hrs or days
c. Overall patterns of weather that prevail from year to year
d. Both a and b
Answer- Both a and b
Que- Which statement about hydrospheric ecosystem is incorrect?
a. Salt water ocean and sea are the largest ecosystems on earth
b. Salt water ecosystem covers about 75% earth surface
c. Fresh water ecosystem covers less than 1% of earth surface
d. It temperature is more moderate to support life
Answer- Salt water ecosystem covers about 75% earth surface
Que- Productivity of an ecosystem is indicated by
a. Number of plants in that ecosystem
b. The density of that ecosystem
c. Consumption of carbon dioxide and evolve of oxygen
d. Both a and b
Answer- Both a and b
Que- In which zone plant community is most diverse
a. Limnetic zone
b. Littoral zone
c. Profundal zone
d. All of these
Answer- Littoral zone
Que- Which statement about profundal zone is correct?
a. Plants are unable to anchor but enough light penetrates to support photosynthesis
b. Phytoplanktons in this region are cyanobacteria
c. Decomposers and detritus feeders inhabit it
d. Water lilies are abundant
Answer- Decomposers and detritus feeders inhabit it
Que- Eutrophication is
a. Process of decreasing nutrients by human activities
b. Adequate nutrition accelerated by human activities
c. Changing the trophic levels of an ecosystem by human activities
d. Addition of more predators in an ecosystem
Answer- Adequate nutrition accelerated by human activities
Que- In polluted lake which organisms dominate the community
a. Fish
b. Crustaceans
c. Phytoplanktons
d. Blue green algae
Answer- Blue green algae
Que- Evolution of vascular bundles in plants and skeleton in animals is an adaptation for
a. Hdrospheric ecosystem
b. Aquatic ecosystem
c. Terrestrial ecosystem
d. All of these
Answer- Terrestrial ecosystem
Que- Development of bark in plants and skin in animals is a method for
a. Providing support
b. Protection from enemies
c. Reducing water loss
d. Helping in food production
Answer- Reducing water loss
Que- Which statement is incorrect?
a. Average rainfall in temperate deciduous forests is 750-1500mm
b. Temperature of coniferous alpine and boreal forests is upto 10 degrees
c. Northern coniferous forests are called Taiga
d. Coniferous forests located at high latitude are alpine
Answer- Coniferous forests located at high latitude are alpine
Que- Temperature of temperate deciduous forests is
a. 4-30 degree C
b. 45-50 degree C
c. 20-25 degree C
d. 5-10 degree C
Answer- 4-30 degree C
Que- Coniferous forests located at high altitude are called
a. Taiga
b. Alpine
c. Boreal
d. Arctic
Answer- Alpine
Que- Grass land in tropic climates with woody trees is called
a. Prairies
b. Savanna
c. Boreal
d. Alpines
Answer- Savanna
Que- Zone of lake water which is of open water near the surface is
a. Littoral
b. Limnetic
c. Profundal
d. Benthic
Answer- Limnetic
Que- Ecosystem of Shogran is
a. Coniferous alpine
b. Boreal
c. Temperate deciduous
d. Grassland
Answer- Temperate deciduous
Que- Mountains of Koh Hindukush come under
a. Tundra
b. Grass land
c. Tropical forests
d. Temperate deciduous
Answer- Tundra
Que- Annual rainfall in grass land is
a. 1500-2500 mm
b. 750-1500 mm
c. 250-750 mm
d. 250-500 mm
Answer- 250-750 mm
Que- One of the most important cause of desertification is
a. Floods
b. Wind blowing
c. Raining
d. Deforestation
Answer- Deforestation
Que- End of earth' is related to
a. Tropical rain forest
b. Temperate deciduous forest
c. Savanna
d. Tundra
Answer- Tundra
Que- Desert ecosystem of Mianwali is
a. Thar
b. Thal
c. Cholistan
d. None of these
Answer- Thal
Que- In sub-humid tropical grassland productivity is more than
a. 700-1500g/m2
b. 4000g/m2
c. 5000g/m2
d. 6050g/m2
Answer- 4000g/m2
Que- Annual rainfall in deserts is less than
a. 150-200 mm
b. 500-700 mm
c. 250-500 mm
d. 700-800mm
Answer- 250-500 mm
Que- Treeless tundra of high latitude between taiga and polar ice caps is called
a. Northern tundra
b. Antarctic tundra
c. Arctic tundra
d. Polar tundra
Answer- Arctic tundra
Que- The most fragile of all biomes is
a. Grassland
b. Coniferous alpine
c. Desert
d. Tundra
Answer- Tundra
Que- Which one is a non-renewable resource?
a. Wild life
b. Forests
c. Natural gas
d. Land
Answer- Natural gas
Que- Process that supplies food to living things through decaying and decomposition is called
a. Food cycle
b. Nutrient cycle
c. Dead-live cycle
d. None of these
Answer- Nutrient cycle
Que- Balance in the nutrient cycle can be upset when
a. Too much food is consumed
b. Not enough food is produced
c. Decayed nutrients are not returned to the ground
d. All of these
Answer- All of these
Que- In air nitrogen is
a. 0.57
b. 0.2
c. 0.79
d. 0.3
Answer- 0.79
Que- In air % of oxygen and carbon dioxide is
a. Oxygen 20%, CO2 0.03%
b. Oxygen 50%, CO2 50%
c. Oxygen 30%, CO2 0.05%
d. Oxygen 25%, CO2 0.02%
Answer- Oxygen 20%, CO2 0.03%
Que- Water constitutes --% of body weight?
a. 25-30%
b. 70-90%
c. 10-30%
d. 30-50%
Answer- 70-90%
Que- Which statement is true?
a. 20% of total water is in the form of frozen ice caps
b. 80% is in oceans
c. 1% as fresh water lakes, streams and rivers
d. 10% is in canals
Answer- 1% as fresh water lakes, streams and rivers
Que- Total area of the world under cultivation is
a. 0.05
b. 0.11
c. 0.21
d. 0.31
Answer- 0.11
Que- Wild life refers to
a. All plants of the world
b. All non cultivated plants
c. Non domesticated animals
d. Both b and c
Answer- Both b and c
Que- Endangered species are
a. Dangerous for the life of humans
b. Reduced in number
c. Already extinct
d. All of these
Answer- Reduced in number
Que- ______% of our energy requirements are met from fossil fuels
a. 50.0
b. 55.0
c. 90.0
d. 95.0
Answer- 95.0
Que- Hydroelectricity is generated by using ______ of falling water.
a. Potential energy
b. Gravitational energy
c. Kinetic energy
d. All of these
Answer- Kinetic energy
Que- Driving force for all the cycles in ecosystem is
a. Water
b. Soil
c. Sun
d. Air
Answer- Sun
Que- Tides are caused by
a. Gravitational pull of sun
b. Movements of large animals in water
c. Uneven water body floor
d. High winds
Answer- Gravitational pull of sun
Que- Wind blows from area of
a. Low pressure to high pressure
b. High pressure to low pressure
c. Moderate pressure to high pressure
d. Low pressure to low pressure
Answer- High pressure to low pressure
Que- Geothermal energy is
a. Energy obtained from nuclear fuel
b. Energy obtained from burning natural fuels
c. Heat energy trapped underground
d. Energy obtained from blowing hot winds
Answer- Heat energy trapped underground
Que- Hot substance is escaped from inside the earth in the form of
a. Volcanoes
b. Hot springs
c. Geysers
d. All of these
Answer- All of these
Que- In oceans of tropical regions
a. Temperature of surface water is 40?C and 10?C at depth
b. Temp of surface water is 25?C and 5?C at depth
c. Surface water 50?C and depth 20?C
d. Surface water 10?C and depth 15?C
Answer- Temp of surface water is 25?C and 5?C at depth