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51.

The aquatic organisms that can actively swim at will against the water current is:A. NeustonB. NektonC. PlanktonD. Benthos

Answer» Correct Answer - B
52.

Smaller extremities in warm-blooded animals of cold areas were proposed by:A. DolloB. GlogerC. AllenD. Bergman

Answer» Correct Answer - C
53.

The response of different organisms to environmental rhythms of light and darkness is called:A. phototropismB. phototaxisC. photoperiodismD. vernalization

Answer» Correct Answer - C
54.

The figure given below is a diagrammatic representation of response of organisms to abiotic factors. What do A, B and C represent respectively? A. (A) conformer (B) regulator (C ) partial regulatorB. (A) regulator (B) partial regulator (C ) conformerC. (A) partial regulator (B) regulator (C ) conformerD. regulator (B) conformer (C ) partial regulator

Answer» Correct Answer - B
55.

Which of the following have evergreen vegetation and drought adapted animals?A. TundraB. SavannaC. ChaparralD. Deciduous forest

Answer» Correct Answer - C
56.

The biome which is characterized by broad-leafed vegetation, fire-resistant resinous plants and drought evading plants is known as:A. SavannaB. SteppesC. ChaparralD. Deciduous forest

Answer» Correct Answer - C
57.

Broad-leaved deciduous forests are typical of:A. monsoon regionB. coniferous forestsC. mid-latitude forestsD. mediterranean region

Answer» Correct Answer - A
58.

The organisms which live in the bottom of lake are called:A. benthosB. nektonC. zooplanktonD. phytoplankton

Answer» Correct Answer - A
59.

Littoral zone is located along the:A. SeaB. RiversC. DesertD. High mountains

Answer» Correct Answer - A
60.

The zone of atmosphere in which the ozone layer is present is called:A. StratosphereB. TroposphereC. IonosphereD. Mesosphere

Answer» Correct Answer - A
61.

From which of the following, photosynthetic autotrophs receive their energy?A. LightB. HeatC. Inorganic chemicalsD. Organic chemicals

Answer» Correct Answer - A
Solar energy is trapped by plants through photosynthesis.
62.

The water zone below 200 meters is called:A. euphotic zoneB. disphotic zoneC. aphotic zoneD. pelagic zone

Answer» Correct Answer - C
63.

It is much easier for a small animal to run uphill than for a large animal, because:A. It is easier to carry a small body weight.B. Small animals have a lower `O_(2)` requirement.C. Smaller animals have a higher metabolic rate.D. The efficiency of muscles in large animals is less than in the small animals.

Answer» Correct Answer - C
64.

Which zone of a lake has no photosynthetic organism?A. Littoral zoneB. Limnetic zoneC. Profundal zoneD. Both (b) and (c )

Answer» Correct Answer - C
65.

Choose the correct combination of labelling of the zones in water in a lake: A. A = Limnetic zone, B = Profundal zone, C = Littoral zone, D = Benthic zoneB. A = Littoral zone, B = Benthic zone, C = Profundal zone, D = Limnetic zoneC. A = Littoral zone, B = Limnetic zone, C = profundal zone, D = Benthic zoneD. A = Limnetic zone, B = Littoral zone, C = Benthic zone, D = Profundal zone

Answer» Correct Answer - C
66.

Phytoplanktons are:A. heterotrophsB. autotrophsC. saprotrophsD. all of these

Answer» Correct Answer - B
67.

Phytoplanktons are dominant in which of the following zones?A. Littoral zoneB. Benthic zoneC. Limnetic zoneD. Profundal zone

Answer» Correct Answer - C
68.

Branch of zoology that deals with the distribution of animals on Earth is called:A. synecologyB. BiogeographyC. ZoogeographyD. Phytogeography

Answer» Correct Answer - C
69.

Pronghorned antelopes and bisons are natives of:A. TundraB. ChaparralC. Rain forestD. Grassland and savanna

Answer» Correct Answer - D
70.

The least porous soil among the following is a:A. Loamy soilB. Silty soilC. Clayey, soilD. Peaty soil

Answer» Correct Answer - C
71.

Moderate rainfall during summer produces:A. DesertB. grasslandsC. shrub forestD. Deciduous forest

Answer» Correct Answer - B
72.

A place where a plant or animal lives:A. HabitatB. NicheC. BiomeD. Ecosystem

Answer» Correct Answer - A
73.

Social position held by one organism with respect to its other associates is termed:A. NicheB. HabitatC. EcotoneD. Ecosphere

Answer» Correct Answer - A
74.

The presence of diversity at the junction of territories of two different habitats is known as:A. Edge effectB. Junction effectC. Pasteur effectD. Bottle neck effect

Answer» Correct Answer - A
75.

Under unfavourable conditions many zooplankton species in lakes and ponds enter a stage of suspended development called:A. DormancyB. HibernationC. DiapauseD. Menopause

Answer» Correct Answer - C
Diapause is a period during which growth or development is suspended and physiological activity is diminished, as in certain insects in response to adverse environmental conditions.
76.

Benthos are:A. periphytonB. zooplanktonC. epineustonD. bottom dwelling primary consumers

Answer» Correct Answer - D
77.

Nektons are:A. algaeB. floating plantsC. suspended lower plantsD. organisms that swim in water

Answer» Correct Answer - D
78.

The northern circumpolar boreal forest comprises:A. TaigaB. TundraC. SavannaD. Chaparral

Answer» Correct Answer - B
79.

The grasslands in Asia are known as:A. pampasB. veldtsC. prairiesD. steppes

Answer» Correct Answer - A
80.

Animals like cockroaches, lizards and mice share the building of human dwellings. Such animals are called:A. humusB. cultigensC. inquilinesD. pelagice

Answer» Correct Answer - C
An animal that characteristically lives commensally in the nest, burrow, or dwelling place of an animal of another species.
81.

What is ecological equivalent of horses in Australian savanna?A. BisonB. ZebraC. AntelopeD. Kangaroo

Answer» Correct Answer - D
82.

A tropical grassland, usually with scattered trees or shrub is called:A. TaigaB. SavannaC. TundraD. None of these

Answer» Correct Answer - B
83.

What will happen to a well growing herbaceous plant in the forest if it is transplanted outside the forest in a park?A. It will grow normallyB. It will grow well because it is planted in the same localityC. It may not survive because of change in its micro climateD. It grows very well because the plants gets more sunlight

Answer» Correct Answer - C
84.

Aquatic animals which can tolerate only a narrow range of salinity are said to be:A. EuryhalineB. StenohalineC. PoikilothermsD. Catadromous

Answer» Correct Answer - B
85.

The factors governing the structure of soil are:A. bioticB. edaphicC. temperatureD. topographic

Answer» Correct Answer - B
86.

Match the following and choose the correct combination from the options given: A. A = 1, B = 3, C = 4, D = 5B. A = 3, B = 2, C = 1, D = 5C. A = 4, B = 3, C = 2, D = 1D. A = 2, B = 4, C = 1, D = 3

Answer» Correct Answer - D
87.

Law of limiting factors in photosynthesis was given by:A. CalvinB. R. HipC. BlackmannD. Arnon

Answer» Correct Answer - C
88.

In which of the following biome maximum number of plants and animals are found?A. DesertsB. TundraC. Tropical rain forestD. Temperate deciduous forests

Answer» Correct Answer - C
89.

Treeless terrestrial biome of cold climate is:A. taigaB. TundraC. SavannaD. plankton

Answer» Correct Answer - B
Tundra is the coldest of all the biomes. Tundra comes from the Finnish word tunturi, meaning treeless plain. It is noted for its frost-molded landscapes, extremely low temperatures, little precipitation, poor nutrients, and short growing seasons.
90.

A natural region characterized by hot summer, warm winter and treeless vegetation is:A. topical desertB. steppes grasslandC. savanna grasslandD. temperate desert

Answer» Correct Answer - A