MDCAT Biology Online Test With Answers

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MDCAT Biology Online Test

Sr. # Questions Answers Choice
1 What is trampling Eating grasses to roots Nipping leaves Overgrazing Putting pressure on soil to make it compact
2 Ornithology is the sudy of Mammals Reptiles Insects Birds
3 Which are pioneers of terrestrial ecosystem Dermatocarpons Parmelia Polytrichum None of these
4 The ecosystem present on land or soil is called Terrestrial ecosystem Lithospheric ecosystem A and B None
5 Infestations are the diseases which are caused by ________ in living organisms Worms Saprophytes Bacteria Virus
6 A relationship that harms one of the partners is called Parasitism Symbiosis Commensalism None
7 The gross production of an ecosystem is its total Photosynthesis Net production Photosynthate Biomass
8 The oxygen concentration in the air is maintained by the green plants which release it during Fermentation Respiration Photosynthesis Chemosynthesis
9 The organisms found in the gut of the termites which help it digest wood are the Bacteria Fungi Flagellates Viruses
10 Which one of the following is an example of commensalism Nodulated roots Remoras attached to sharks Mycorrhiza Commensalism
11 A symbiotic association between a fungus and the roots of higher plants is known as Lichen Parasitism Mycorrhiza Commensalism
12 The correct sequence in a food chain is Mice - green plants - snake - hawke Green plants - mice - snake - hawk Mice - snake - green plants - hawk Green plants - hawk - snake - mice
13 Which one of the following does not refer to mutialism Mycorrhiza Parasitism Lichen Bacteria in the gut of cow
14 Which of the following is always an intracellular parasite Zooparasite Viral parasite Phyto parasite Microbial parasite
15 In an ecosystem sheep and rabbits are examples of Producers Predators Grazers Saprophytes
16 An animal which captures and readily kills living animals for its food is known as Parasite Predator Scavenger Consumer
17 A lichen is the symbiotic association between a Fungus and a bryophyte Roots of higher plants and an alga Fungus and an alga Roots of a higher plants and a fungus
18 Which one of the following is true Population is a larger unit than a community Bioshpere is a smaller unit than a biome Biome and community are equal units Biome is a larger unit than population
19 The example of decomposers of the ecosystem are the Fungi Fungi and bacteria Bacteria Viruses
20 The biotic components of the ecosystem are the Producers Consumers Producers,consumers and the decomposers Decomposers
21 Producers are Heterophs Green plants Carnivores Herbivores
22 A community is A collection of plants and animals Autotrophs and heterotrops Population of different species living together in the same area Food chain
23 The study of relationship of an organisms to their environment is known is Biology Ecology Zoology Mycology
24 Elements required in large amount are called Micronutrient Macronutrient Organic elements Inorganic elements
25 Grazers feed mainly on which kind of plants Tree leaves Shrubs Grasses Cereals
26 Infestations are the diseases which are caused by ________ in living organisms Parasites Saprophytes Bacteria Viruses
27 Moss stage is represented by Polytrichum Tortula Adiantum Both a and b
28 Which of these stages appears as a pioneer during succession on barren land? Foliage lichens Mosses Crustose lichens Fruiticose lichens
29 A symbiotic relationship that benefits one species & neither helps nor harms the other is called Mycorrihza Symbiosis Commensalism Mutualism
30 Consumers that prey other animals are known as Predators Preys Parasites Competitors
31 Which include seral stages of a primary succession are Lichen & algae Mosses and ferns Grasses & shrubs All of these
32 Climax in zerosere is the establishment fo Woody forest Grasses Herbs Shrubs
33 The succession which occurs in dry soil or rock is Hydrosere Xerosere Decrosere All of these
34 The change in structure of community of an ecosystem during a time period is called Succession Evolution Mutation Regression
35 The major components of ecosystem are 2 3 4 6
36 Food chains combine to form Large food chain Large organisms Trophic levels Food web
37 Fungi as well as bacteria are generally known as Producers Consumers Decomposers None
38 "Litho" means Air Earth / soil Water All of these
39 The relationship of a single population towards its environment is called Ecology Synecology Autoecology All of foregoing
40 Layer of earth where life is present is called Hydrosphere Lithosphere Biosphere Topography
41 Regional ecological community of plants & animals primarily determined by climate Biome Niche Habitat Both b & c
42 Group of interbreeding organisms residing together in space & times are Community Population Genus Family
43 The tundra vegetation supports the animals called: lemmings Marchpolo sheeps Goats None of these
44 In tandra forests the willow tree with an age of 50 year have diameter of trunk only: 5 cm 7 cm 8 cm 10 cm
45 Tundra ecosystem is a vast treeless region bordering the: Pacific ocean Atlantic ocean Arctic ocean Arabian sea
46 The average rainfall in desert ecosystem is: 20 - 30 cm 20 - 40 cm 25 - 50 cm 14 - 35 cm
47 The desert ecosystem of western punjab is called: Thar Thal Alpine Boreal
48 In temperate grassland the rate primary production is about: &nbsp;700 - 1400 g/m<sup>2</sup> 700 - 1600 g/m<sup>2</sup> 700 -1800 g/m<sup>2</sup> 700 - 1500 g/m<sup>2</sup>
49 Annual rainfall in grassland is about: 250 to 650 mm 250 to 850 mm 250 to 450 mm 250 to 750 mm
50 Grassland which do not have woody plants are called: Savana Tundra Prairies Boreal
51 In coniferous alpine and boreal forest the temperature ranges from: 0°C to 10°C Below freezing point up to 10°C Below freezing point up to 15°C 0°C to 15°C
52 In coniferous alpine and boreal forests the winter is: Longer and little Shorter and colder Longer and colder Shorter and little warmer
53 The soil of the deciduous forest is: Yellow Grayish brown Grayish black Black
54 Mascara is a type of: Lion Bird Monkey Bear
55 In temperature deciduous forest the range of temperature is form: 0∘C - 30∘C 4∘C - 30∘C 4∘C - 25∘C 4∘C - 40∘C
56 In temperature deciduous forest the average rainfall is: 650 -1500 mm 750 -1500 mm 800 - 1600 mm 700 - 1500 mm
57 Forest ecosystem is subdivided into ____ type of forests. Two Four Five Three
58 Terrestrial ecosystem have main types of ecosystem: Five Four Three Two
59 One mechanism of temperature regulation was developed by land plans and animals by developing. Brak and skin Vascular tissues and circulatory system Cambium and excretory system Vascular tissue and respiratory system
60 One poles the average temperature is: At freezing point Below freezing point Above freezing point More then 5∘C
61 In lithospheric ecosystem the availability of water is: Unlimited UniForm Limited Zero
62 The dead plants and animal bodies in lakes are decomposed by certain: Cyanobacteria Bacteria Mold Protozoans&nbsp;
63 In limnetic zone the phytoplankton are: Cyanobacteria Protozoan Fungi&nbsp; Bacteria&nbsp;
64 In littoral zone, the zooplanktons are: Protozoan and coelenterates Protozoan and porifers Protozoan and flatworms Protozoan and crustacean&nbsp;
65 In littoral zone, the water is: Deeps Very deep Shallow Comes with wave only
66 The lake ecosystem can be divided into ______ number of zones: Two Three Four Five
67 The productivity of aquatic ecosystem is basically determined by the: Light and nutrients Light and carbohydrates&nbsp; Light and proteins&nbsp; Light and minerals &nbsp;
68 The productivity can be indicated by: Consumption of water and evolve of O<sub>2</sub> Consumption of CO<sub>2</sub> and water Consumption of CO<sub>2</sub> and evolve of O<sub>2</sub> Consumption of minerals and evolve of N<sub>2</sub>
69 Fresh water ecosystem  cover the land only: 2% 3% 4% 1%
70 The essential requirement for life is: Minerals Water&nbsp; Carbohydrates Proteins&nbsp;
71 The nutrients in aquatic ecosystem tends to be concentrated near the Bottom Surface Center of total depth 10 feet below the surface
72 A little light is left to power photosynthesis at the depth of: 500 feet 700 feet 600 Feet 1000 Feet
73 Water changes its temperature: Faster than air Same as air Slower than air Sometime slower and sometimes faster
74 In hydrospheric ecosystem the exchange material and transfer of energy takes place.  Within water and air Within water and land Within water Within land and air&nbsp;
75 Salt water ocean and sea are the largest ecosystem which cover __________ of earth surfaces. 70% 71% 80% 65%
76 Life on earth is affected by both Weather and water Weather and climate Climate and water Water and air
77 The amount of energy left after plants have met their respiratory needs shows up the plant: Not productivity Gross productivity&nbsp; Secondary productivity Bio energy
78 We can strengthen the soil nitrogen resources by adding: Liquid nitrogen to soil Ammonia gas to soil Nitrogen fertilizers to soil Nitrogen fixing bacteria to soil&nbsp;
79 When bacteria break down nitrates and release nitrogen  back into atmosphere this process is called: Nitrification&nbsp; Denitrification&nbsp; Ammonification&nbsp; Deamination&nbsp;
80 Most nitrogen moves from the soil into the roots in the form of: Nitrogen gas&nbsp; Nitrites&nbsp; Ammonia Nitrates&nbsp;
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