MDCAT Biology Chapter 8 MCQ's Test With Answers

MDCAT Biology Chapter 8 MCQ's Test

Sr. # Questions Answers Choice
1 The amount of energy left after plants have met their respiratory needs shows up the plant: Not productivity Gross productivity  Secondary productivity Bio energy
2 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 
3 When bacteria break down nitrates and release nitrogen  back into atmosphere this process is called: Nitrification  Denitrification  Ammonification  Deamination 
4 Most nitrogen moves from the soil into the roots in the form of: Nitrogen gas  Nitrites  Ammonia Nitrates 
5 When bacteria in soil oxidize ammonia or ammonium ions this is called: Oxidation Denitrification  Ammonification Nitrification 
6 Much of nitrogen found in the soil is the result of: Degeneration  Decomposition  Denitrification Assimilation 
7 Iron, iodine and zinc required by the organisms are said to the: Macronutrients Micronutrients  Moderate nutrients Assimilation 
8 Macronutrients are required by the organisms in: Small amount Large amount Traces Never required 
9 Due to the trampling of the soil layer by the hooves of grazing animals the rain water will: Penetrate deep into the soil Not penetrate this soil Stop on the soil Do not affect this layer of  the soil
10 The land will be turned to barren land if there is: Little grazing Moderate grazing  Over grazing None grazing
11 The attachment of shark and small fish remoras is an example of: Mutualism Parasitism Predation Commensalism 
12 The relationships between insects and flowering plants is an example of: Parasitism Predation Mutualism None of these
13 The root nodules bacteria fix ______ in sil air: Parasitism Carbon dioxide  Nitrogen Hydrogen 
14 In case of symbiosis ___________ is benefited. Host Parasite  Both host and parasite  None of these
15 Parasites which live inside the host body is called: Ectoparasite  Endoparasite  Intestinal parasite Muscular parasite 
16 As the number of the predators decreases the numbering of prey: Decreases Increases Remain constant  Sometime increases sometime decrease
17 Herbaceous stage in xerosere is the __________: First stage  Third stage Fourth stage  Last stage 
18 Xerosere starts with __________ stage. Crustose lichen Foliose lichen Mass Shrub
19 Plants like cacti store their water in large: Collenchyma tissues Mesenchymal tissues Parenchyma tissues Epidermal tissues 
20 Plants growing on dry habitat is called: Hydrophytes Mesophytes  Xerophytes  None of these above 
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